Introduction - Communications
... using multiple protocol layers: • Each protocol is implemented independently • Each protocol is responsible for a specific subtask • Protocols are grouped in a hierarchy • A structured set of protocols is called a communications architecture or protocol suite ...
... using multiple protocol layers: • Each protocol is implemented independently • Each protocol is responsible for a specific subtask • Protocols are grouped in a hierarchy • A structured set of protocols is called a communications architecture or protocol suite ...
Slide 1
... IP Header Length (4 bits) – Identifies the number of 32-bit words in the header. – The IHL value varies due to the Options and Padding fields. – The minimum value for this field is 5 (i.e., 5×32 = 160 bits = 20 bytes) and the maximum value is 15 (i.e., 15×32 = 480 bits = 60 bytes). ...
... IP Header Length (4 bits) – Identifies the number of 32-bit words in the header. – The IHL value varies due to the Options and Padding fields. – The minimum value for this field is 5 (i.e., 5×32 = 160 bits = 20 bytes) and the maximum value is 15 (i.e., 15×32 = 480 bits = 60 bytes). ...
Games and the Impossibility of Realizable Ideal Functionality
... NAV (Network Allocation Vector): 15-bit field. Max value: 32767 Any node can reserve channel for NAV seconds No one else should transmit during NAV period … but not followed by most 802.11b cards ...
... NAV (Network Allocation Vector): 15-bit field. Max value: 32767 Any node can reserve channel for NAV seconds No one else should transmit during NAV period … but not followed by most 802.11b cards ...
Data Link Layer Switching
... a router was unable to find the given destination address router sent back ICMP (Type 3) packet sending host received the packet, returned error code to TCP TCP returned error code to application (e.g. ftp, telnet, http) ...
... a router was unable to find the given destination address router sent back ICMP (Type 3) packet sending host received the packet, returned error code to TCP TCP returned error code to application (e.g. ftp, telnet, http) ...
1.01 - BRAUDE
... Nevertheless, in many cases OSI layer 6 makes sense (encryption, compression, data representation) and used in analysis ...
... Nevertheless, in many cases OSI layer 6 makes sense (encryption, compression, data representation) and used in analysis ...
doc
... graphs from collected data. The application protocol that will be used to analyze TCP will be FTP. ...
... graphs from collected data. The application protocol that will be used to analyze TCP will be FTP. ...
Hands-On Ethical Hacking and Network Security
... access large number of ports, in close sequence, on single host, in short time TCP session initiated to IP address, immediately terminated, not followed by additional communication, observable in firewall log TCP session only half set up then abandoned, potentially observable in firewall log ...
... access large number of ports, in close sequence, on single host, in short time TCP session initiated to IP address, immediately terminated, not followed by additional communication, observable in firewall log TCP session only half set up then abandoned, potentially observable in firewall log ...
Multiplexing, Circuit Switching and Packet Switching Circuit Switching
... – The header introduces overhead, that is, additional bits to be sent • Therefore, it is not wise to have packets that are too small – What happens if the payload is just 1 bit? ...
... – The header introduces overhead, that is, additional bits to be sent • Therefore, it is not wise to have packets that are too small – What happens if the payload is just 1 bit? ...
Multimedia
... congestion (router buffer overflow) delay loss: IP datagram arrives too late for playout at receiver ...
... congestion (router buffer overflow) delay loss: IP datagram arrives too late for playout at receiver ...
25-Multimedia-Network
... pick CDN node with shortest delay (or min # hops) to client (CDN nodes periodically ping access ISPs, reporting results to CDN DNS) ...
... pick CDN node with shortest delay (or min # hops) to client (CDN nodes periodically ping access ISPs, reporting results to CDN DNS) ...
Lecture 1: Course Introduction and Overview
... source user dest user (Call it UDP/IP) IP Header (20 bytes) 16-bit source port 16-bit UDP length ...
... source user dest user (Call it UDP/IP) IP Header (20 bytes) 16-bit source port 16-bit UDP length ...
- Mitra.ac.in
... Consider sending 64 kbps PCM-encoded voice over RTP. Application collects the encoded data in chunks, e.g., every 20 msec = 160 bytes in a chunk. The audio chunk along with the RTP header form the RTP packet, which is encapsulated into a UDP segment. RTP header indicates type of audio encodi ...
... Consider sending 64 kbps PCM-encoded voice over RTP. Application collects the encoded data in chunks, e.g., every 20 msec = 160 bytes in a chunk. The audio chunk along with the RTP header form the RTP packet, which is encapsulated into a UDP segment. RTP header indicates type of audio encodi ...
ICMP
... The ping command uses the echo request and echo reply messages to determine whether a physical connection exists between systems. Another important function on the Internet is traffic control, and the source quench message can be sent to tell a sending host that the destination host cannot keep up ...
... The ping command uses the echo request and echo reply messages to determine whether a physical connection exists between systems. Another important function on the Internet is traffic control, and the source quench message can be sent to tell a sending host that the destination host cannot keep up ...
Slide 1
... IAX is also NAT-proof, so dozens or hundreds of simultaneous calls from behind a masquerading firewall will function correctly, just like HTTP. IAX is much more compact because it has been developed only for telephony applications While a complete cycle of registration, call signaling, voice transmi ...
... IAX is also NAT-proof, so dozens or hundreds of simultaneous calls from behind a masquerading firewall will function correctly, just like HTTP. IAX is much more compact because it has been developed only for telephony applications While a complete cycle of registration, call signaling, voice transmi ...
IPv6 The New Internet Protocol
... • Destination – Carries information to be read just by destination nodes ...
... • Destination – Carries information to be read just by destination nodes ...
IT1402 -MOBILE COMPUTING
... – provides reliable data transfer based on request/reply paradigm • no explicit connection setup or tear down • optimized setup (data carried in first packet of protocol exchange) • seeks to reduce 3-way handshake on initial request – supports • header compression • segmentation /re-assembly • retra ...
... – provides reliable data transfer based on request/reply paradigm • no explicit connection setup or tear down • optimized setup (data carried in first packet of protocol exchange) • seeks to reduce 3-way handshake on initial request – supports • header compression • segmentation /re-assembly • retra ...
Troubleshooting Networks with Packet Histories
... The Planet was rocked by a pair of network outages that knocked it off line for about 90 minutes on May 2, 2010. The outages caused disruptions for another 90 minutes the following morning.... Investigation found that the outage was caused by a fault in a router in one of the company's data ...
... The Planet was rocked by a pair of network outages that knocked it off line for about 90 minutes on May 2, 2010. The outages caused disruptions for another 90 minutes the following morning.... Investigation found that the outage was caused by a fault in a router in one of the company's data ...
PPT - SlideTutor
... L. and Vancza, J. (Eds). Proceedings of the 14th International Conference on Industrial & Engineering Applications of Artificial Intelligence and Expert Systems, Budapest, Hungary, Springer, pp. 931-940, 2001 Ritter, S. and Koedinger, K. R. (1996). An architecture for plug-in tutor agents. Journal o ...
... L. and Vancza, J. (Eds). Proceedings of the 14th International Conference on Industrial & Engineering Applications of Artificial Intelligence and Expert Systems, Budapest, Hungary, Springer, pp. 931-940, 2001 Ritter, S. and Koedinger, K. R. (1996). An architecture for plug-in tutor agents. Journal o ...
Cisco Voice Programs - In Search of a Strategy
... Time to : • High Priority Queue Empty • The Router starts sending packet fragments from another queue ...
... Time to : • High Priority Queue Empty • The Router starts sending packet fragments from another queue ...
www.cs.kau.se
... • On receiving INIT chunk, server does not allocate memory for TCB – Instead sends cookie in INIT ACK for authentication ...
... • On receiving INIT chunk, server does not allocate memory for TCB – Instead sends cookie in INIT ACK for authentication ...
Transport layer
... Connection oriented means that a virtual connection is established before any data is transferred. Connection ensures that the receiving process is available and ready before the data is sent Three-way handshaking connection establishment procedure because TCP is full-duplex both side must initializ ...
... Connection oriented means that a virtual connection is established before any data is transferred. Connection ensures that the receiving process is available and ready before the data is sent Three-way handshaking connection establishment procedure because TCP is full-duplex both side must initializ ...
Transport Layer
... Connection oriented means that a virtual connection is established before any data is transferred. Connection ensures that the receiving process is available and ready before the data is sent Three-way handshaking connection establishment procedure because TCP is full-duplex both side must initializ ...
... Connection oriented means that a virtual connection is established before any data is transferred. Connection ensures that the receiving process is available and ready before the data is sent Three-way handshaking connection establishment procedure because TCP is full-duplex both side must initializ ...
Network Intro
... the bridge has a list of the Ethernet addresses on each separate net packets are accepted from one side and forwarded to the other side, as needed the bridge is invisible (transparent) to the Ethernet cards ...
... the bridge has a list of the Ethernet addresses on each separate net packets are accepted from one side and forwarded to the other side, as needed the bridge is invisible (transparent) to the Ethernet cards ...