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WPA3 Security Enhancements: Video 3 of 4. Dragonfly for PSK Passwords
 
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Dragonfly protocol, specified in IRTF RFC 7664 and in Section 12.4 (SAE) of the IEEE 802.11 standard, provides offline dictionary attack resistance for PSK. Dragonfly is similar to its proprietary predecessor called SPEKE. Dragonfly makes offline password dictionary attack computationally intractable, irrespective of the size of the dictionary. Watch this video for details on Dragonfly.
Views: 2231 Mojo Networks
Authenticated Key Exchange Protocols for Parallel Network File Systems
 
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2015 IEEE Transaction on Network Security For More Details::Contact::K.Manjunath - 09535866270 http://www.tmksinfotech.com and http://www.bemtechprojects.com Bangalore - Karnataka
Views: 1527 manju nath
Authenticated Key Exchange Protocols for Parallel Network File Systems
 
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Authenticated Key Exchange Protocols for Parallel Network File Systems TO GET THIS PROJECT IN ONLINE OR THROUGH TRAINING SESSIONS CONTACT: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landmark: Opp. To Thattanchavady Industrial Estate & Next to VVP Nagar Arch. Landline: (0413) - 4300535 / Mobile: (0)8608600246 / (0)9952649690 Email: [email protected], Website: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com We study the problem of key establishment for secure many-to-many communications. The problem is inspired by the proliferation of large-scale distributed file systems supporting parallel access to multiple storage devices. Our work focuses on the current Internet standard for such file systems, i.e., parallel Network File System (pNFS), which makes use of Kerberos to establish parallel session keys between clients and storage devices. Our review of the existing Kerberos-based protocol shows that it has a number of limitations: (i) a metadata server facilitating key exchange between the clients and the storage devices has heavy workload that restricts the scalability of the protocol; (ii) the protocol does not provide forward secrecy; (iii) the metadata server generates itself all the session keys that are used between the clients and storage devices, and this inherently leads to key escrow. In this paper, we propose a variety of authenticated key exchange protocols that are designed to address the above issues. We show that our protocols are capable of reducing up to approximately 54% of the workload of the metadata server and concurrently supporting forward secrecy and escrow-freeness. All this requires only a small fraction of increased computation overhead at the client.
Views: 986 jpinfotechprojects
L2Sec Helper class issue: The wireless network security key is not correct Windows 10
 
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How to fix 'L2Sec Helper class' issue found while troubleshooting wireless network connection. Root cause: Windows cannot connect to 'Wi-FI'. The wireless network security key is not correct. Detailed root cause: Layer 2 security key exchange using user-supplied key did not generate unicast keys before timeout. Error code: Security attempt status fail 0x00048005. Repair option: Verify the network security key. View the security settings.You can then type the correct security key.
Views: 3284 troubleshooterrors
RSA Algorithm in Network Security With Example | Question on RSA Asymmetric Key Cryptography
 
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► Link for Cryptography: https://www.youtube.com/watch?v=trHox1bN5es ► Link for Symmetric Key in Cryptography: https://www.youtube.com/watch?v=6AmmQiOWoXM&t=47s ► Link for Asymmetric key in Cryptography: https://www.youtube.com/watch?v=xw19eT5thIE&t=75s ► Link for Computer Networks Playlist: https://www.youtube.com/playlist?list=PLxCzCOWd7aiGFBD2-2joCpWOLUrDLvVV_ ► Link for Artificial Intelligence Playlist: https://www.youtube.com/playlist?list=PLxCzCOWd7aiHGhOHV-nwb0HR5US5GFKFI ► Link for Operating System Playlist- https://www.youtube.com/playlist?list=PLxCzCOWd7aiGz9donHRrE9I3Mwn6XdP8p ► Link for Database Management System Playlist- https://www.youtube.com/playlist?list=PLxCzCOWd7aiFAN6I8CuViBuCdJgiOkT2Y ► Link for Graph Theory Playlist- https://www.youtube.com/playlist?list=PLxCzCOWd7aiG0M5FqjyoqB20Edk0tyzVt ► Last Minutes Preparation for UGC NET and GATE Playlist- https://www.youtube.com/playlist?list=PLxCzCOWd7aiE4LQMkIhAe9amWX_SPNMiZ ► Analysis of NTA UGC NET Dec 2018 CS : https://www.youtube.com/watch?v=oKJ1MsLvp1k ► Analysis of NTA UGC NET June-2018 : https://www.youtube.com/watch?v=uTBdBOB7AME ► NTA UGC-NET Data Structure Paper analysis and previous year Questions Explanation: https://www.youtube.com/watch?v=PZs7az8cxPQ&t=8s ► NTA UGC NET Algorithm & Data Structure Previous year Questions Explanation: https://www.youtube.com/watch?v=akVtp2B9AnI&t=14s ► NTA UGC-NET C/C++ Paper analysis and previous year Questions Explanation https://www.youtube.com/watch?v=bH7uT7lBMGg&t=50s ►MUST WATCH Before you start preparing for any competitive exam: https://www.youtube.com/watch?v=KycO72Zgr0c&t=2s ► Schedule for NTA UGC NET Computer Science: https://www.youtube.com/watch?v=_-UOsa2bkzQ&t=2s ► New Syllabus of NTA UGC NET Computer Science: https://www.youtube.com/watch?v=tBRgI-oobOk&t=9s ► Previous year Questions Explanation of GATE, UGC-NET & PSUs: https://www.youtube.com/playlist?list=PLxCzCOWd7aiG9x0zDA4heJ3TWLqTE3gE4 ► Link for UGC-NET Mock Test Series Playlist: https://www.youtube.com/playlist?list=PLxCzCOWd7aiEJtXNeIfxa5dqm6SnFJ9Oj ------------------------------------------------------------------------------------------------- Our Social Links: ► Subscribe to our YouTube channel: https://www.youtube.com/gatesmashers ► Like Our page on Facebook - https://www.facebook.com/gatesmashers/ ► Whatsapp: In order to receives updates about UGC NET Computer Science , Whatsapp your name to 9876444511. Save our number in your phonebook to receive updates on Whatsapp. ► For any Query and Suggestions- [email protected] #RSA#Cryptography#NetworkSecurity
Views: 11271 Gate Smashers
IPv6 Neighbor Discovery.avi
 
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http://spirent.com This video will explain the basic mechanism of IPv6 Neighbor Discovery (RFC 4861) using ICMPv6. This example will show how two hosts discover each other and verify that they are not using duplicate addresses.
Views: 17162 alantalkstech
Why Do We Need To Use HTTPS Encryption
 
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Why do we need to use HTTPS and encryption? I show you a visit to a *government* website that takes credit cards over HTTP while running Wireshark (a packet sniffer) and show you just how important it is that we use encryption for our network communications. ► SUBSCRIBE FOR MORE VIDS! http://www.youtube.com/subscription_center?add_user=davidstaplesga ► Support Me On Patreon: https://www.patreon.com/DavidStaplesGA ► Follow Me On Twitter: http://twitter.com/davidstaples ► Follow Me On Tumblr: http://dstaples.tumblr.com ► Follow Me On Instagram: http://instagram.com/4x4geek ► Follow Me On Pinterest: http://www.pinterest.com/david_staples ► Like Me On Facebook: http://facebook.com/davidstaplesgat
Views: 231 David Staples
What is GEOCAST? What does GEOCAST mean? GEOCAST meaning, definition & explanation
 
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What is GEOCAST? What does GEOCAST mean? GEOCAST meaning - GEOCAST pronunciation - GEOCAST definition - GEOCAST explanation - How to pronounce GEOCAST? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Geocast refers to the delivery of information to a group of destinations in a network identified by their geographical locations. It is a specialized form of multicast addressing used by some routing protocols for mobile ad hoc networks. A geographic destination address is expressed in three ways: point, circle (with center point and radius), and polygon (a list of points, e.g., P(1), P(2), …, P(n–1), P(n), P(1)). A geographic router (Geo Router) calculates its service area (geographic area it serves) as the union of the geographic areas covered by the networks attached to it. This service area is approximated by a single closed polygon. Geo Routers exchange service area polygons to build routing tables. The routers are organized in a hierarchy. Geographic addressing and routing has many potential applications in geographic messaging, geographic advertising, delivery of geographically restricted services, and presence discovery of a service or mobile network participant in a limited geographic area (see Navas, Imieliński, 'GeoCast - Geographic Addressing and Routing'.)
Views: 378 The Audiopedia
Почему плохо работает WiFi
 
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Почему плохо работает WiFi by Илья Князев (SPW, Россия) PDF: https://mum.mikrotik.com/presentations/RU_PT18/presentation_5089_1521408630.pdf
Views: 5560 MikroTik
Module 6: What is SSL (Secure Sockets Layer)?
 
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SSL (Secure Sockets Layer) is important because it allows you to establish an encrypted link between a server and a client It helps keep your information such as credit card numbers, social security numbers and login credentials secure References: What Is SSL (Secure Sockets Layer) and What Are SSL Certificates? (n.d.). Retrieved February 18, 2015, from https://www.digicert.com/ssl.htm
Views: 1101 Simple Security
OSPF Neighbor States
 
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EDIT: The line should say "INIT: received Hello from neighbor but did not see own router ID" from 11:40 forward. In this video, we're going to discuss the OSPF neighbor states. Briefly, the OSPF states are Down, Attempt, Init, 2-Way, ExStart, Exchange, Loading, and Full. The 2-Way and Full states are stable. If a router is stuck in any other state, it indicates a problem in forming adjacencies. The Down state is the first OSPF neighbor state and means that no Hello packets have been received from a neighbor. The Attempt state is only valid for manually configured neighbors in NBMA networks. In the Attempt state, the router sends unicast Hello packets every poll interval to the neighbor, from which Hellos have not been received within the dead interval. The Init state specifies that the router has received a Hello packet from its neighbor, but the receiving router's ID was not included in the Hello packet. The 2-Way state designates that bidirectional communication has been established between the neighbors. Bidirectional means that each router has seen the other's Hello packet. This state is attained when the router receiving the Hello sees its own router ID in the received Hello packet. Possible DR/BDR election also happens in this state. In the ExStart state, the routers establish the master/slave relationship. The router with the higher router ID becomes the master and starts the exchange. In the Exchange state, the routers exchange database description (DBD) packets. The DBD packets describes the sender's link-state database by sending LSA headers to the neighbor. The neighbor can then request missing or more recent LSA from the sender. n the Loading state, the actual exchange of link state information occurs. Based on the information provided by the DBDs, routers send and request link state information. In the Full state, routers are fully adjacent with each other. All the LSAs have been exchanged and the databases are fully synchronized. Thank you for watching! OSPF neighbor states diagram: http://www.firewall.cx/networking-topics/routing/ospf-routing-protocol/1142-ospf-adjacency-neighbor-states-forming-process.html
Views: 732 Network Playroom
What is Partners in Food Solutions?
 
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A short introduction to Partners in Food Solutions
Universal Network Coding-Based Opportunistic Routing for Unicast
 
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1 crore projects offer ENOUGH OF CLASSROOM KNOWLEDGE NOW GET READY FOR REAL WORLD TRAINING. Project: IEEE Projects and Real Time Projects We invite all final year students for their IEEE projects, for free of cost which involves their Internship training and Course Knowledge with Cost of Rs. 5000 1 Crore projects Scope Explanation on Topics and Practical training Training on Tools & Technique for all sessions. Sharing the technical expertise on applications Certification from 1 crore projects . Institution Scope . All Technical Infra structure/Class rooms and other facilities as may be required. . Training Time table should be prepare and submit by the institution. Benefits of joining 1 crore projects : 1. 3 main certificates (Internship, Course Completion, Final Year Project) 2. Placement Assistance.( 3 Companies) 3. 80 Hours of Hands On Practice Call me at: 7708150152 HR Manager 7708150152 CONTACT US 1 CRORE PROJECTS Door No: 214/215,2nd Floor, No. 172, Raahat Plaza, (Shopping Mall) ,Arcot Road, Vadapalani, Chennai, Tamin Nadu, INDIA - 600 026 Email id: [email protected] website:1croreprojects.com Phone : +91 97518 00789 / +91 72999 51536
Views: 159 1 Crore Projects
A novel implementation of an SFTP model with server-side file privacy
 
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This project is a demonstration of how we can set up a client-server architecture to allow for secure file transfers between multiple parties, as well as store it persistently on a cloud storage. Now, while storing encrypted files is a relatively easy task, we also ensure that the server-side user, either malicious or legitimate, is unable to decrypt the files even after snooping through the network traffic. We've proposed the use of a modified version of the Diffie-Hellman key exchange protocol, wherein more than two parties can arrive at a shared key. We also use public-key encryption to authenticate users before the key exchange, so that man-in-the-middle attacks are completely mitigated. In this video, we demonstrate the different components developed to set up this architecture. The first component registers the individual users onto the cloud service. The second component sets owner-access permissions to the files uploaded by the users, to be accessible by both the creator and the collaborating users. The third component is a notification system which allows for sending multicasted updates to owners of a particular file. It also supports sending unicast messages to individual users. Moreover, we support persistent queuing of messages, so that if a user is sent messages while he or she is offline, the messages will be delivered and flushed from the server only after that user logs in and pulls those messages. The fourth component handles the actual end-to-end encryption of the files, and transferring them to the server's persistent storage. Key exchange protocols as well as user authentication mechanisms take place between the server and the client before any further communications. Also, to negotiate the shared key for collaborated files, a modified version of the popular key exchange protocol (Diffie-Hellman Key Exchange Algorithm) is used to distribute keys to different users. To consolidate all of this for a user, we've built a custom terminal emulator that supports only certain whitelisted commands. All other commands are immediately rejected to prevent unauthorized use of the application. (For example, `sudo rm /` won't delete my entire file system. xD) This project was developed by a team of three - Ayush Soni, Reuben John, and Soorya Annadurai. We're all third-year Computer Science students in Manipal Institute of Technology, India. This is an open-source project, and you can find the project here: https://github.com/three-horsemen/sftp If you have any ideas or suggestions, do let us know in the comments! We'll definitely try adding or improving this architecture. Thanks for watching!
Views: 52 Soorya Annadurai
Universal Network Coding-Based Opportunistic Routing for Unicast
 
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Universal Network Coding-Based Opportunistic Routing for Unicast TO GET THIS PROJECT IN ONLINE OR THROUGH TRAINING SESSIONS CONTACT: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landmark: Opp. To Thattanchavady Industrial Estate & Next to VVP Nagar Arch. Landline: (0413) - 4300535 / Mobile: (0)8608600246 / (0)9952649690 Email: [email protected], Website: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com Network coding-based opportunistic routing has emerged as an elegant way to optimize the capacity of lossy wireless multihop networks by reducing the amount of required feedback messages. Most of the works on network coding-based opportunistic routing in the literature assume that the links are independent. This assumption has been invalidated by the recent empirical studies that showed that the correlation among the links can be arbitrary. In this work, we show that the performance of network coding-based opportunistic routing is greatly impacted by the correlation among the links. We formulate the problem of maximizing the throughput while achieving fairness under arbitrary channel conditions, and we identify the structure of its optimal solution. As is typical in the literature, the optimal solution requires a large amount of immediate feedback messages, which is unrealistic. We propose the idea of performing network coding on the feedback messages and show that if the intermediate node waits until receiving only one feedback message from each next-hop node, the optimal level of network coding redundancy can be computed in a distributed manner. The coded feedback messages require a small amount of overhead, as they can be integrated with the packets. Our approach is also oblivious to losses and correlations among the links, as it optimizes the performance without the explicit knowledge of these two factors
Views: 412 jpinfotechprojects
3-node Random Unicast with Link-specific Transmission Power Control Model
 
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Random Unicast with Link-specific Transmission Power Control of 3 nodes. Every node changes its transmission power matched to its neighbor range. The sent packet will not be forwarded to next hop. And, indeed, its destination will be the one among neighbors, no one else. The simulation firstly get started in tx-matching period. In the period, the nodes will find all proper tx-power level that is matched to each of their neighbors. It takes about 4 minutes. After that, the simulation begins and continues by 5 minutes. The energy consumption of the nodes would be shown after then.
Network coding -The case of multiple unicast sessions.
 
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In a network that supports multiple unicast, there are several source terminal pairs; each source wishes to communicate with its corresponding terminal. In this work we consider linear network coding schemes for wired three-source, three-terminal directed acyclic networks with unit capacity edges. Each source contains a unit-entropy message that needs to be communicated to the corresponding terminal. Our achievability schemes use a combination of random linear network coding and appropriate preceding. In particular, our solutions are based either scalar codes or vector codes that operate over two time units (i.e., two network uses). This is potentially useful, as one could arrive at multiple unicast schemes for arbitrary rates by packing unit-rate structures for which our achievability schemes apply. We first investigate a two-unicast scenario with connectivity Level and rate requirement and use that in conjunction with vector network coding to address three-unicast with connectivity level. We use random linear coding and precoding at the sources to arrive at the result By Sachin prabha Ramesh.R
Views: 138 Gokul Varathan
How to configure Perfect Forward Secrecy(PFS) in WAN Group VPN(GVC) and what is the purpose of enabl
 
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Learn about how to configure Perfect Forward Secrecy(PFS) in WAN Group VPN(GVC) and what is the purpose of enabling this feature, “SonicWall video solutions” https://fuzeqna.com/sonicwallkb/ext/kbdetail.aspx?kbid=12411
Views: 724 Dell EMC Support
PLNOG15 - G-IKEv2 (Salah Gherdaoui,  Praveena Shanubhogue)
 
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Cisco Group Encrypted Transport VPN (GET VPN) includes a set of features that are necessary to secure IP multicast group traffic or unicast traffic over an enterprise private WAN that originates on or flows through a Cisco device. The GETVPN G-IKEv2 feature implements Internet Key Exchange version 2 (IKEv2) protocol on GETVPN thereby allowing GETVPN to derive the benefits of IKEv2. Some of those advantages are: o Less packets (typically 4 instead of 10) o Dead Peer Detection and Network Address Translation-Traversal o Certificate URLs o Denial of Service Attack Resilience o EAP Support o Multiple Crypto Engines o Suite-B Support o Reliability and State Management (Windowing) http://www.facebook.com/PLNOG http://www.plnog.pl http://www.twitter.com/plnog
Views: 383 PROIDEA Events
What is SECURE MULTICAST? What does SECURE MULTICAST mean? SECURE MULTICAST meaning & explanation
 
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What is SECURE MULTICAST? What does SECURE MULTICAST mean? SECURE MULTICAST meaning - SECURE MULTICAST definition - SECURE MULTICAST explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ IP Multicast is an internet communication method where a single data packet can be transmitted from a sender and replicated to a set of receivers. The replication techniques are somewhat dependent upon the media used to transmit the data. Transmission of multicast on an inherent broadcast media such as Ethernet or a satellite link automatically allows the data packet to be received by all the receivers directly attached to the media. In contrast, transmission of multicast on media that is point-to-point or point-to-multipoint requires the packet to be replicated for each link. The replication process should occur in an optimal manner where a distribution tree is built within the network. The packet can be replicated at each of the branches in the tree. This mitigates the requirement for the sender to replicate the packet once for each recipient. The use of IPsec as a communication link requires a point-to-point connection establishment. Usually, the security is required from sender to receiver which implies the sender must replicate the packet on each of the secure connections - one for each receiver. As the number of receivers grows, the sender must scale by replicating the packet to each of the receivers. The processing load placed on the sender can be high which limits the scalability of the sender. A new method was required to securely transmit multicast and this was referred to as Secure Multicast or Multicast Security. The Internet Engineering Task Force (IETF) created a new Internet Protocol (IP) to securely transmit multicast traffic across a packet network. The protocol definition was developed in the Multicast Security Workgroup and led to several Request for Comments (RFC) that are now used as standards for securing IP multicast traffic. The protocol allowed a sender to encrypt the multicast packet and forward it into the packet network on the optimal distribution tree. The packet may be replicated at the optimal locations in the network and delivered to all the receivers. The receivers are capable of decrypting the packet and forwarding the packet in the secure network environment. The sender of a multicast packet does not know the potential receivers; therefore, the creation of pair-wise encryption keys (one for each receiver) is impossible. The sender must encrypt packets using a shared key that all the legitimate receivers use to decrypt the packets. The security of the system is based on the ability to control the distribution of the keys only to those legitimate receivers. For this, the IETF created the Group Domain of Interpretation (GDOI) protocol defined in RFC-6407. The protocol allows the sender and receiver to join a key server where policies and keys are encrypted and distributed to the members of the secure multicast group. The key server can authenticate and authorize senders and receivers into a specific group where the shared key is used to encrypt and decrypt traffic between members of the group.
Views: 114 The Audiopedia
Crack WPA/WPA2-PSK using aircrack-ng
 
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Wi-Fi Protected Access (WPA) and Wi-Fi Protected Access II (WPA2) are two security protocols to secure wireless computer networks. WPA was developed as a replacement to broken Wired Equivalent Privacy (WEP) in 2003, as WEP can be bypassed very easily and effectively using various methods. WPA uses RC4 stream cipher based Temporal Key Integrity Protocol (TKIP) to ensure that each data packet is transmitted with a unique encyption key, thereby preventing the types of attacks that compromised WEP. However, a flaw has been discovered on TKIP based WPA which relies on chopchop attack used in WEP cracking. TKIP is much stronger than a cyclic redundancy check algorithm (CRC) used in WEP, but not as strong as the Counter Mode Cipher Block Chaining Message Authentication Code Protocol, Counter Mode CBC-MAC Protocol (CCMP) algorithm used in WPA2. WPA2 uses Advanced Encryption Standard (AES) block cipher based CCMP. It is stronger than TKIP in both privacy and integrity. Authentication modes : 1. WPS mode 2. Personal mode 3. Enterprise mode WPS mode has already been discussed and exploited in previous video. Here is the link in case you missed it https://youtu.be/7XYt5-FeB7U PERSONAL or PSK mode was designed for home and small office networks. This mode use a 256 bit key to encrypt the network traffic, which is a string of 64 hexadecimal digits or a passphrase of 8 to 63 printable ASCII characters. If ASCII characters are used, the 256 bit key is calculated by applying the PBKDF2 key derivation function to the passphrase, using the SSID as the salt and 4096 iterations of HMAC-SHA1. Personal mode is available in both WPA and WPA2, which is the topic of this video. The authentication takes place by a 4-way handshake in both PSK and Enterprise mode. Initial authentication is done using PSK or EAP exchange to ensure the client is authenticated to the access point (AP). After PSK authentication a secret shared key is generated called Pairwise Master Key (PMK). The PSK is derived from a password that is put through PBKDF2-SHA1 as the cryptographic hash function. In a pre-shared-key network, the PSK is actually the PMK. For AP and client exchanging encrypted data, both need to have the right key(s) installed. Each time a client (Supplicant) associates to an AP (Authenticator), new Pairwise Temporal/Transient Key (PTK) is generated, which is unique for each connected client. In case of Broadcast and Multicast frames, all clients use the same Groupwise Temporal Key (GTK) that don’t require a new generation for each association. The function to generate a Pairwise Temporal Key (PTK) is known as a Pseudo Random Function (PRF): PTK = PRF(PMK + ANonce + SNonce + APMAC + SMAC) Nonce is number used once and are pseudo random numbers. Anonce and Snonce are AP and STA (client or station) nonces respectively. APMAC and SMAC are MAC addresses of AP and STA respectively. The 4-way handshake takes place as follows : 1. The AP sends Anonce to the client or STA. 2. The client sends the SNonce to the AP protected by a cryptographic hash (HMAC-SHA1) called Message Integrity Code (MIC) for integrity of this message. The message also includes the Robust Security Network Information Element (RSN IE). 3. The AP constructs and sends the GTK and a sequence number together with another MIC. 4. The Supplicant acknowledges the installation of PTK and GTK afterwards, encrypted Unicast and Broadcast/Multicast transmission can start now. Using aircrack along with a dictionary or crunch bruteforce can take from fews minutes to lifetime to crack the passkey. However, the things can be accelerated using rainbow tables, precomputed hashes, GPU power. A long random alphanumeric password containing upper and lower case letters and special characters is beyond the of computation power available till now. However no one uses such passwords instead people use passwords which are easy to remember, and hence are vulnerable to such attacks. So, in order to speeed up the cracking process what we do is that we use precomputed hashes, and hence saving the conversion time required to hash all words in a wordlist. Rainbow tables come up with precomputed hashes for most commonly used SSIDs. Remember two different SSIDs with same password will produce different hashes. So in order to use rainbow table against captured hash one must ensure first the target network's SSID is present in most commonly used 1000 SSIDs list. In case your SSID is not present in that list then you cant create your own rainbow table using tools like RainbOwCrack. We can make our own hashes for a partical SSID using genpmk and testing the created hashes against captured hash using another tool called cowpatty. In order to use GPU power we can use tools loke oclHashCat, which uses GPU power along with CPU power to crack the wifi key. I am going to cover all these topics in coming tutorials.
Views: 886 sh4dy rul3zz
Universal Network Coding-Based Opportunistic Routing for Unicast
 
01:16
Universal Network Coding-Based Opportunistic Routing for Unicast To get this project in ONLINE or through TRAINING Sessions, Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Network coding-based opportunistic routing has emerged as an elegant way to optimize the capacity of lossy wireless multihop networks by reducing the amount of required feedback messages. Most of the works on network coding-based opportunistic routing in the literature assume that the links are independent. This assumption has been invalidated by the recent empirical studies that showed that the correlation among the links can be arbitrary. In this work, we show that the performance of network coding-based opportunistic routing is greatly impacted by the correlation among the links. We formulate the problem of maximizing the throughput while achieving fairness under arbitrary channel conditions, and we identify the structure of its optimal solution. As is typical in the literature, the optimal solution requires a large amount of immediate feedback messages, which is unrealistic. We propose the idea of performing network coding on the feedback messages and show that if the intermediate node waits until receiving only one feedback message from each next-hop node, the optimal level of network coding redundancy can be computed in a distributed manner. The coded feedback messages require a small amount of overhead, as they can be integrated with the packets. Our approach is also oblivious to losses and correlations among the links, as it optimizes the performance without the explicit knowledge of these two factors
Views: 201 jpinfotechprojects
routing protocols | Hybrid Wireless N/w |  lec-52 | Bhanu Priya
 
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routing protocols for hybrid wireless networks
Views: 714 Education 4u
LED Programming in Contiki OS - IoT Tutorial 9
 
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This application is about the programming of LEDs through c source code. The files needed are 1. stdio.h 2. contiki.h 3. dev/leds.h You can download the source code through https://www.nsnam.com https://www.engineeringclinic.com https://github.com/tspradeepkumar/contiki
Views: 310 Engineering Clinic
Complete Ethical Hacking Course | Ethical Hacking Training for Beginners | Edureka
 
02:55:53
**Cybersecurity Training: https://www.edureka.co/cybersecurity-certification-training ** This Edureka "Ethical Hacking Course" video will give you an expansive view into Ethical Hacking. This video will give you an exhaustive understanding on key topics of Ethical Hacking for beginners! Below are the topics covered in this Ethical Hacking tutorial: 4:30 Early days of hacking 5:40 The first computer worm 6:33 Hacking in Popular culture 7:47 Reason People Hack 13:40 Types of Hackers 19:39 Necessary Skills 24:13 Types of Attacks 32:03 What is Penetration Testing? 33:23 Goals of Penetration Testing 33:50 Results of Penetration Testing 34:42 Scope of Penetration Testing 39:25 What is Footprinting? 42:49 Wayback Machine 49:50 Using DNS to retrieve information 51:30 whois and dig 55:10 Hostname Resolution 1:01:30 Finding Network Range 1:05:14 Google Hacking 1:09:40 Google Hacking Database 1:12:13 History of the Internet 1:17:40 TCP/IP and OSI Model 1:25:20 UDP Packet Analysis using Wireshark 1:29:54 Addressing 1:31:48 Wireshark 1:37:50 What is DHCP? 1:41:35 Why use DHCP? 1:43:05 ARP Protocol 1:48:57 Cryptography 1:49:43 What is Cryptography? 1:51:06 History of Cryptography 1:57:00 DES 2:00:27 AES 2:02:40 DES working 2:03:11 Tripple DES working 2:05:05 AES Working 2:06:14 Types of Cryptography 2:11:40 Public Key Encryption 2:16:50 Digital Certificates 2:18:40 Generating Your Own Certificate 2:23:17 Hashing 2:27:43 TLS and SSL 2:29:01 TLS working through Wireshark 2:31:00 SSL scan 2:33:09 Disencryption on Windows and MAC 2:35:43 Scanning 2:38:00 What is Nmap? 2:38:49 Nmap Usage 2:48:14 What is IDS? 2:50:20 Why evade IDS? 2:52:29 PackETH Packet Creation #edureka #edurekaEthicalHacking #ethicalhackingcourse #ethicalhacker #cybersecurity #ethicalhacking Do subscribe to our channel and hit the bell icon to never miss an update from us in the future: https://goo.gl/6ohpTV Instagram: https://www.instagram.com/edureka_learning Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka For more information, Please write back to us at [email protected] or call us at IND: 9606058406 / US: 18338555775 (toll-free).
Views: 75104 edureka!
Understanding, optimizing & securing enterprise network connectivity to Office 365
 
01:08:56
Microsoft delivers more than 200 cloud services, including Xbox, MSN, Bing and Office 365. These services are hosted in Microsoft’s datacenters, which are connected to our customers by one of the world’s largest global networks with very high bandwidth and low latency links. By understanding how this infrastructure works, and by following a set of key network principles, you can optimize your connectivity whilst abstracting your organization from change that occurs in the Cloud. In this session we'll look at how Outlook, SharePoint/OneDrive and Skype for Business connect to Office 365 in individually unique ways to optimize performance, but, by following the key principles, these differences should be abstracted from your organization.
GET VPN configuration example
 
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Complete description with screenshots: http://www.certvideos.com/get-vpn-configuration-example/
Views: 6807 Shyam Raj
Introducing Azure Service Bus Premium Messaging
 
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Azure Service Bus is the core messaging platform that sits at the heart of many sophisticated Azure-based solutions today. Azure Service Bus Premium Messaging is a new offering, now entering public preview that builds on the successful and reliable foundation of Service Bus Messaging. Premium Messaging provides a number of key enhancements for greater predictability and performance required for the most demanding workloads – paired with an equally predictable pricing model. With Service Bus Premium Messaging, you benefit from the economics and operational flexibility of a multi-tenant public cloud system, while getting single-tenant reliability and predictability .
What is PPP ? | PPP Protocol | Point to Point Protocol (in hindi)
 
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Dosto is Video Main Mene Aap Sab Ko What is PPP ?, Where is it used ?, ppp protocol tutorial, ppp protocol in hindi, ppp protocol, Point-to-Point Protocol, What is PPP protocol in networking?, serial lines,RFC 1661,Internet Engineering Task Force, ke baare mein bataay hai Mere Hisab se Aap Sab ko Pasand Ayega. Previous Video Link :- What is SLIP | Slip Protocol | Serial Line Internet Protocol ? https://www.youtube.com/watch?v=CABhIdP-dVw #Technandan Subscribe Tech Nandan What is Deep Web, Dark Web, Surface Web,Marianas Web ? https://www.youtube.com/watch?v=gv9KcpQDO6A Qualcomm Snapdragon 675 SOC | What is special features ? https://www.youtube.com/watch?v=-c2HyieEH9w Blog - https://technandanm.blogspot.com/ Website - https://www.technandan.ml/ Facebook Page - https://www.facebook.com/technandan #PPP #PointtoPointProtocol #RFC 1661 #Protocol #TCP/IP #IETF
Views: 172 Tech Nandan
Ubiquiti - Broadcast Domains & CSMA/CA
 
03:25
Broadcast Domains & CSMA/CA In networking, Layer-2 hardware, including switches, Access points & bridges, are programmed to forward Broadcast Message so as to reach all Hosts on the LAN. The area over which a Broadcast message reaches is known as the Broadcast Domains, which is synonymous with the size of the Local Area Network. Because the Broadcast Domain represents the interconnected topology of layer-2 equipment, more Switches, Access Points, and Bridges equates to a larger Broadcast Domain. By comparison, however, Routers do not forward Broadcast Messages, and therefore mark the boundaries of the Broadcast Domain, that is, the LAN. When the Broadcast Domain becomes too large or populous, Broadcast Messages lead to Broadcast Storms, where normal Host traffic causes LAN performance to suffer tremendously, noting increased latency and reduced throughput. A good rule of thumb is to limit the size of a LAN to no greater than a couple hundred Network Devices, before building another Network Segment and Range. Building a new LAN is as simple as adding another Router, with new LAN interfaces. However, a more cost-effective, practical way to add additional Network Segments and Ranges is to implement Virtual LANs on existing Network Devices. As more Local Networking continues to trend toward mobile computing, Wireless Design & planning for Networks becomes increasingly more important. Like Switches, Access Points expand the Broadcast Domain, but face a unique challenge, since Wireless Stations in the same proximity, by design, compete for shared access to the Wireless Channel over which they transmit. Whenever two Wireless Stations attempt to transmit over top of each other, a collision can result at nearby Receiver Radios, necessitating a retransmission. In order to reduce the chance of collisions, the 802.11 Wireless protocol relies on Carrier Sense Multiple Access / Collision Avoidance, or CSMA/CA for short, which basically requires Wireless Stations “Listen before Talk”. If the Wireless Channel is occupied, wait, then listen again before transmitting. Despite reducing collisions, CSMA/CA is an imperfect access method, as seen in scenarios involving Hidden Nodes, where a receiver hears two transmitters, but the transmitters cannot hear each other, whether due to proximity or physical obstructions. And although mechanisms like Request-to-Send, Clear-to-Send, mitigate the effect of Hidden Nodes, CSMA/CA remains an imperfect access method, with upper limits on the density and volume of stations in a wireless coverage area.
Views: 146 ElmatSpa
A Distributed Three-hop Routing Protocol to Increase the Capacity of Hybrid Wireless Networks
 
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A Distributed Three-hop Routing Protocol to Increase the Capacity of Hybrid Wireless Networks IN DOT NET To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83.Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai,Thattanchavady, Puducherry -9.Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690, Email: [email protected], web: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com
Views: 390 jpinfotechprojects
Secure Overlay Routing Using Key Pre-Distribution: A Linear Distance Optimization Approach
 
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Secure Overlay Routing Using Key Pre-Distribution: A Linear Distance Optimization Approach We are ready to provide guidance to successfully complete your projects and also download the abstract, base paper from our website IEEE 2015 Java Projects: http://chennaisunday.com/projectsNew.php?id=42&catName=Latest_IEEE_2015-2016_Java_Projects IEEE 2015 Dotnet Projects: http://chennaisunday.com/projectsNew.php?id=43&catName=Latest_IEEE_2015-2016_Dotnet_Projects
How to send BACnet Who-Has Request with Cimetrics Free BACnet Explorer
 
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You can easily find out which BACnet devices contain a particular Object with Cimetrics BACnet Explorer. Who-has broadcasts a request with either the object name or the object type/instance, and may also include the device instance range.
Views: 332 cimetrics
What is Video Broadcast Services - Video Marketing Experts
 
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What is Video Broadcast Services - Video Marketing Experts http://VideoBroadcastServices.com Welcome to Video Broadcast Services, if you're tired of spending money on marketing and advertising that delivers lackluster results and only provides a short term delivery of content, or it directs your intended traffic to another website, after all the whole idea of online marketing is to capture the traffic for your website and business, while heavily trafficked websites promise exposure, it also exposes your intended customer, client or patient to your competition, the advertising is ongoing, expensive and lacks results, our marketing and advertising strategies we provide at Video Broadcast Services is different and complete with all the tools such as SEO, Video SEO, You Tube, Social Media and Content Marketing all rolled into one powerful video marketing campaign. The result? Permanent placements within the major search engines that gain your website and business a massive online presence, qualified traffic and permanent lead generation. Why are we different than other marketing firms? We will not work for your competitors, we never require a long- term contract, we place the results on our checkbook, not yours. We do not limit key words, zip or area codes, that's old school and we have the most attentive customer service you have ever experienced, in addition we provide a tangible product you can see and the results we obtain. We also provide a much needed boost to your other forms of media advertising 90% of all consumers after watching, hearing or viewing your advertisement will still take the major search engines such as Google to search for your website or business, Video Broadcast Services will ensure they find your website and business and not your competitors. Pay Per Click, while effective is competitive, expensive and may not deliver the sales and conversions and ROI you need. We also provide round the clock support and consulting to ensure your advertising and marketing is working and keeping up with all the latest updates and demands of the Internet. While many still believe video marketing is simply placing a video on your website or You Tube, that is NOT what we do at Video Broadcast Services, there is no need to hire an expensive videoographer, those are simply not marketing videos and they costs thousands of dollars for just one video, besides much like your website the video then must still be found by your intended audience. In order for the videos to be found they must have marketing integrated into their production, and that is exactly what we provide at Video Broadcast Services from start to finish, we take care of everything, scripts, production, marketing, broadcasting the videos we create that speak directly to your new customer, client or patient, who are online searching for your goods and services, the end result, we create a massive online presence about your business and direct qualified traffic to your website, increasing sales and revenue while permanently placing your business and your online visibility ahead of your competitors, call us at 480-200-4222. http://www.youtube.com/watch?v=fd29SHqtM-M What is Video Broadcast Services - Video Marketing Experts
4 Types Of Social Advocacy | #TribalSketches
 
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In this #TribalSketches we will discuss the 4 most valueable social advocacy networks that creates a relationship pipeline in your company; your employees, 3rd party partner ecosystem, customer advocacy and your fan network. -- Use our Employee Advocacy Workbook to Create Your Employee Advocacy Plan with Confidence here: https://hubs.ly/H0d0WpS0 -- Tribal Impact specialises in B2B inbound business advocacy. If you want to drive higher lead conversion with your marketing and faster revenue growth for sales, mobilise your most powerful and trusted brand voice on social media - your employees. By creating an approach to align your sales and marketing team, you can unlock the potential of your employees and start delivering measurable inbound impact. At Tribal Impact our training and services are designed to empower your employees to become your authentic voice on social media - whether Social Selling, Employee Advocacy and Content Marketing.
Views: 64 Tribal Impact Ltd
🔵 100% ЗАЩИТА ОТ ХАКЕРОВ, СЛЕЖКИ И ЦЕНЗУРЫ. КРИПТОВАЛЮТА MAINFRAME - ОБЗОР ТОКЕНА MFT
 
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☑️ Онлайн-курс COIN-TRADE http://web.coin-trade.pro/ ☑️ Онлайн-курс COIN-TRADE Бот @Co1nTrader_bot ☑️ Наш сайт https://rkt8.io ☑️ Наш робот для майнинга криптовалюты в соцсетях http://rkt8.io/rkt8robot ☑️ Наш канал в Телеграм https://t-do.ru/Raketat8 ☑️ Наш канал Raketa T8 http://raketa8.ru/youtube ☑️ Инстаграм Ракета Т8 https://www.instagram.com/sergerado ➤ 100% защита от хакеров, слежки и цензуры. Криптовалюта Mainframe - обзор токена MFT 0:25 Онлайн-курс COIN-TRADE онлайн -курсы 0:48 Описание проекта Mainframe (MFT) 1:08 История появления Mainframe (MFT) 4:22 Бизнес-модель Mainframe (MFT) 10:14 Курс токена MFT 11:15 Команда Mainframe 12:54 Перспективы проекта Mainframe на 2018 год 15:47 Где купить и где хранить токен MFT 16:17 Инвестиционное решение проекту Mainframe Mainframe (MFT) - это децентрализованная сеть с протоколом шифрования контента для приложений Dapps, то есть все хранимые и передаваемые данные в этой сети полностью защищены от нежелательного просмотра, цензуры и взломов. ICO Mainframe проводилось только в приватном режиме. На этом этапе ICO в Mainframe инвестировали венчурные фонды и частные крупные инвесторы, о которых далее я скажу. Открытого же Token Sale не было. В связи с тем, что команда работает в юрисдикции США, они решили ограничиться частным раундом, чтобы избежать какие либо проблемы в будущем. Цель Mainframe предоставить всем, как отдельным пользователям интернета, так и организациям, возможность безопасно управлять своими данными. При этом обмениваясь данными вы будите уверены что кроме получателя никто не сможет видеть вашу информацию. Первая особенность Mainframe - это шифрование. Вторая особенность Mainframe - Темная маршрутизация ( Dark Routing ). Третья особенность Mainframe - это Стимулирование (Incentivization ). Четвертая особенность Mainframe - это Одноранговая Архитектура ( Peer-to-Peer Architecture ). Пятая особенность Mainframe - это Совместимость ( Interoperability ).  Onyx это приложение Mainframe для обмена сообщениями по типу корпоративной сети.  Mainframe однозначно перспективный проект на мой взгляд. Во-первых это достойная идея. Во-вторых это активная команда. В третьих это предстоящие Аиродропы Mainframe. Пятая причина перспективности Mainframe  это наличие венчурных инвесторов которые с самого начала поддержали проект, своими инвестициями в закрытом раунде ICO. Среди них такие фонды как: Neo Global Capital, ETHER Capital, GBIC, Youbi Capital: https://youtu.be/IlbL0aRx0Bc, Cenetic Capital и другие. Для покупки токена MFT выбор бирж пока сравнительно не большой. Но среди них есть высоколиквидные биржи: Binance, Upbit, Bittrex и другие. Кроме того Mainframe можно купить и на децентрализованной бирже IDEX, обзор на которую есть у нас на канале Rocket Pitch: https://youtu.be/Vr6Lm1NJOy0 Хранить токен MFT можно кошельках эфириума. Самый популярный это Myetherwallet или Mycrypto: https://youtu.be/pjEge2IEZbk ☑️ Обзор проекта Mainframe на сайте RKT8.io https://rkt8.io/obzory-kriptovaljut/100-zashhita-ot-hakerov-slezhki-i-cenzury-kriptovaljuta-mainframe-obzor-tokena-mft.html ☑️ Сайт проекта Mainframe https://mainframe.com/ ☑️ White paper проекта Mainframe https://mainframe.docsend.com/view/j39qpui ☑️ Чат проекта Mainframe https://t.me/mainframehq ☑️ Материал для обзора готовила Виктория Криптовик ☑️ Наш канал в Телеграм https://t-do.ru/Raketat8 ☑️ Наш канал Raketa T8 http://raketa8.ru/youtube ☑️ Наш робот для майнинга криптовалюты - токенов RKT8 в соцсетях http://rkt8.io/rkt8robot ☑️ О наших роботах http://telegra.ph/Dva-ROBOTa-v-odnoj-komande-05-05 ⚠️ОБРАТИ ВНИМАНИЕ НА ДИСКЛЕЙМЕР https://youtu.be/OHMUAvy8h6Y ---------- Клуб начинающих криптовалютных инвесторов Ракета Т8: → Медиум https://medium.com/@raketat8 → Телеграм чат команды https://t.me/cosmodrom_t8 → Телеграм канал http://raketa8.ru/tlgrm → Вконтакте - http://raketa8.ru/vk → Фейсбук - http://raketa8.ru/fb --------- ❤ Поддержи сообщество - регистрируйся по рефкам: → Удобный сервис для торговли на бирже http://raketa8.ru/3commas →Самая крупная биржа Бинанс http://raketa8.ru/binance → Биржа без верификации Кукойн http://raketa8.ru/kucoin ------------------------------ Ссылка на это видео https://youtu.be/dwLDe1fdK58 Похожее видео https://youtu.be/c1Bg4VqvJSc Плейлист https://www.youtube.com/watch?v=HeFyx_m33PU&list=PLA1RBEfBxte4NmGoG_ELDJAKD_oNQCRbv ----------- Обзоры ICO проектов, ICOпитчи, блокчейн-разработки и токенизация реального бизнеса. Полные разборы для инвесторов. Как правильно выбрать ICO проект для инвестирования и не нарваться на скам
Views: 11711 Rocket pitch
Optimal Configuration of Network Coding in Ad Hoc Networks
 
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2015 IEEE Transaction on Adhoc Networks For More Details::Contact::K.Manjunath - 09535866270 http://www.tmksinfotech.com and http://www.bemtechprojects.com Bangalore - Karnataka
Views: 230 manju nath
The Universally Unique Identifiers Story
 
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You listen to the story of the interoperability issues with regard to the use of universally unique identifiers, or short UUID, in the exchange of aeronautical data in AIXM format. This story is kindly provided by SOLITEC Software Solutions.
20190225 IPv6 ipsec tunnel
 
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Demo dan analisa tunnel menggunakan IPSec dan Racoon di IPv6 OnnoCenter
Views: 96 Onno Center
Contiki - zolertia
 
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RPL network using zoul motes
Views: 52 Diego Sanz
Free CCNA | OSPF Introduction - Day 44 | 200-125 | Cisco Training
 
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OSPF Introduction | Free CCNA: In this video, Imran explains the basics of Open Shortest Path First (OSPF) with a video title OSPF Introduction. He shows the process involved, how OSPF Neighbors are formed and how they exchange the Link State Advertisement (LSA) and how they populate the Link State Data Base (LSDB). He also explains about the Dijkstra's Shortest Path First algorithm. Channel Description: Official Website: www.nwking.org Want to become a CCNA? Cannot find any appropriate FREE video, that is legal? Cannot find any quality video that breaks down the learning process into simple to follow steps? Well, NetworKing came into being to bring quality training to students for FREE. We currently have a large database of different training videos covering almost all the major certifications in the world. Please subscribe to our YouTube channel to Watch the World's best training video, FREE for personal use! Get your CCNA certification in 60 days! Old Exam Code: ‎200-120 CCNA New Exam Code: 200-125 CCNAv3 All our videos can be found in the following playlist: https://www.youtube.com/playlist?list=PLh94XVT4dq02frQRRZBHzvj2hwuhzSByN Networking Social Media: www.youtube.com/NetworKingInc www.facebook.com/NetworkingConsultant www.twitter.com/NetworKingInc Imran Rafai's Social Media: www.twitter.com/imranrafai www.linkedin.com/in/imranrafai www.facebook.com/imran.rafai Copyright of NetworKing and Imran Rafai. Downloading this video from YouTube would be in violation of the copyright. Users are allowed to ONLY watch this video training from the above links. If you want to download the video, you can buy it by contacting '[email protected]'. If this video is found on any other channel, please report to '[email protected]'.
Views: 33442 NetworKing
Collision Tolerant and Collision Free Packet Scheduling for Underwater Acoustic Localization
 
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Collision Tolerant and Collision Free Packet Scheduling for Underwater Acoustic Localization TO GET THIS PROJECT IN ONLINE OR THROUGH TRAINING SESSIONS CONTACT: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landmark: Opp. To Thattanchavady Industrial Estate & Next to VVP Nagar Arch. Landline: (0413) - 4300535 / Mobile: (0)8608600246 / (0)9952649690 Email: [email protected], Website: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com This article considers the joint problem of packet scheduling and self-localization in an underwater acoustic sensor network with randomly distributed nodes. In terms of packet scheduling, our goal is to minimize the localization time, and to do so we consider two packet transmission schemes, namely a collision-free scheme (CFS), and a collision-tolerant scheme (CTS). The required localization time is formulated for these schemes, and through analytical results and numerical examples their performances are shown to be dependent on the circumstances. When the packet duration is short (as is the case for a localization packet), the operating area is large (above 3 km in at least one dimension), and the average probability of packet-loss is not close to zero, the collision-tolerant scheme is found to require a shorter localization time. At the same time, its implementation complexity is lower than that of the collision-free scheme, because in CTS, the anchors work independently. CTS consumes slightly more energy to make up for packet collisions, but it is shown to provide a better localization accuracy. An iterative Gauss-Newton algorithm is employed by each sensor node for self-localization, and the Cramér Rao lower bound is evaluated as a benchmark.
Views: 424 jpinfotechprojects
IPv6 - Basics
 
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IPv6 - Basics This video is for Educational Purposes Only. I do not advocate breaking the law and I am not responsible for any damages caused by the information contained in this video This video was created for Information Security class taught by Professor Faisal Kaleem as a part of the Masters of Science in Management of Information Systems FIU -- Cohort 26
Views: 200 Ashlesh Shenoy
2011 GATE Questions for CSE with Solved Answers on Computer Networks
 
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2011 GATE Questions for CSE with Solved Answers on Computer Networks..A layer-4 firewall ( a device that can look at all protocol headers up to the transport layer) CANNOT..Consider different activities related to email. m1:Send an email from a mail client to mail server m2:Download an email from mailbox server to a mail client m3:Checking email in a web browser.. Which is the applicable level protocol user in each activity.. 3.The network uses a Distance Vector Routing protocol. Once the routes have stabilized, the distance vectors at different nodes are as following.N1:(0, 1, 7, 8, 4)N2:(1, 0, 6, 7, 3)N3:(7, 6, 0, 2, 6)N4:(8, 7, 2, 0, 4)N5:(4, 3, 6, 4, 0) Each distance vector is the distance of the best known path at that instance to nodes, N1 to N5, where the distance to itself is 0. Also, all links are symmetric and the cost is identical in both directions. In each round, all nodes exchange their distance vectors with their respective neighbours. Then all nodes update their distance vectors. In between two rounds, any change in cost of a link will cause the two incident nodes to change only that entry in their distance vectors. The cost of link N2-N3 reduces to 2 (in both directions). After the next round of update what will be the new distance vector at node, N3?
cisco switch configuration VLAN Trunk Protocol (VTP)
 
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VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products. Playlist - http://www.youtube.com/playlist?list=PLF1D12779A04D70C0 Website - http://www.ciscoarmenia.com/ Facebook - https://www.facebook.com/groups/netacad.am/?ref=ts&fref=ts VTP is used to exchange VLAN information across trunk links, reducing VLAN administration and configuration errors. VTP allows you to create a VLAN once within a VTP domain and have that VLAN propagated to all other switches in the VTP domain. VTP pruning limits the unnecessary propagation of VLAN traffic across a LAN by determining which trunk ports forward which VLAN traffic. You learn to configure, verify, and troubleshoot VTP implementations. VTP Components There are number of key components that you need to be familiar with when learning about VTP. Here is a brief description of the components, which will be further explained as you go through the chapter. VTP Domain-Consists of one or more interconnected switches. All switches in a domain share VLAN configuration details using VTP advertisements. A router or Layer 3 switch defines the boundary of each domain. VTP Advertisements-VTP uses a hierarchy of advertisements to distribute and synchronize VLAN configurations across the network. VTP Modes- A switch can be configured in one of three modes: server, client, or transparent. VTP Server-VTP servers advertise the VTP domain VLAN information to other VTP-enabled switches in the same VTP domain. VTP servers store the VLAN information for the entire domain in NVRAM. The server is where VLANs can be created, deleted, or renamed for the domain. VTP Client-VTP clients function the same way as VTP servers, but you cannot create, change, or delete VLANs on a VTP client. A VTP client only stores the VLAN information for the entire domain while the switch is on. A switch reset deletes the VLAN information. You must configure VTP client mode on a switch. VTP Transparent-Transparent switches forward VTP advertisements to VTP clients and VTP servers. Transparent switches do not participate in VTP. VLANs that are created, renamed, or deleted on transparent switches are local to that switch only. VTP Pruning-VTP pruning increases network available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to reach the destination devices. Without VTP pruning, a switch floods broadcast, multicast, and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them.
Views: 3457 Edik Mkoyan