instead of NAK, receiver sends ACK for last pkt received OK ... rdt3.0 works, but performance stinks. example: 1 Gbps link, 15 ms e-e prop. delay, 1KB packet: ...
receiver sees no difference in two scenarios! incorrectly passes duplicate data as new in (a) ... seq # is byte-stream number of first data byte in segment. timeout: ...
Chapter 3 Transport Layer Kurose and Ross forgot to say anything about wrapping the carry and adding it to low order bit rdt2.0: error scenario Wait for call from ...
Some s are in courtesy of J. Kurose and K. Ross ... requires countdown timer. 14. rdt3.0 sender. sndpkt = make_pkt(0, data, checksum) udt_send(sndpkt) ...
stop and wait. Transport Layer. 3-26. rdt2.1: sender, handles garbled ACK/NAKs ... Wait for ACK or NAK 1. L. L. Transport Layer. 3-27. rdt2.1: receiver, handles ...
Computer Networking: A Top Down Approach Featuring the Internet, ... current pkt if ACK/NAK garbled ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for ...
provide logical communication between app processes running on different hosts ... requires countdown timer. Internetworking. 22. rdt3.0 in action. Internetworking. 23 ...
provide logical communication between app processes running on ... requires countdown timer. Transport Layer. 3-24. rdt3.0 in action. Transport Layer. 3-25 ...
Want an abstraction of a reliable link even though packets can be ... current pkt if ACK/NAK garbled ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for ...
provide logical communication between app' processes running on ... requires countdown timer. 3: Transport Layer. 3a-29. rdt3.0 sender. 3: Transport Layer ...
Receiver can only handle a fixed amount of data. Problem 2: ... current pkt if ACK/NAK garbled ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for call ...
sender retransmits current pkt if ACK/NAK garbled. sender adds sequence number to each pkt ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for call 0 from above ...
LIVENESS: a packet sent is eventually received. separate FSMs for sender, receiver: ... If continuously sending packets, eventually, an uncorrupted packet received. ...
Review of Previous Lecture Transport-layer services Multiplexing and demultiplexing Connectionless transport: UDP Some s are in courtesy of J. Kurose and K. Ross
understand principles behind transport layer services: multiplexing/demultiplexing ... connectionless transport: UDP. principles of reliable data transfer ...
learn about transport layer protocols in the Internet: UDP: connectionless transport TCP: connection-oriented transport TCP congestion control Our goals:
incrementally develop sender, receiver sides of reliable data transfer protocol (rdt) ... requires countdown timer. retransmits if no ACK received in this time ...
Dept. of Computer Science. Rutgers University. cs352. 2. Themes. Principles ... Characteristics of unreliable channel will determine complexity of reliable data ...
Transport Layer Goals: understand principles behind transport layer services: multiplexing/demultiplexing reliable data transfer flow control congestion control
learn about transport layer protocols in the Internet: UDP: connectionless transport TCP: connection-oriented transport TCP congestion control Our goals:
Reliable Data Transfer Transport Layer Goals: understand principles behind transport layer services: multiplexing/demultiplexing reliable data transfer flow control ...
Este material est basado en el material preparado como apoyo al texto Computer ... Ejemplo: enlace de 1 Gbps, 15 ms de retardo ext. a ext, paquetes de 1KB: ...
Title: 3rd Edition: Chapter 3 Author: Jim Kurose & Keith Ross Last modified by: Roland Kempter Created Date: 10/8/1999 7:08:27 PM Document presentation format
Ram Dantu (compiled from various text books) Chapter 3: Transport Layer Our goals: understand principles behind transport layer services: multiplexing/demultiplexing ...
... Reliability Error detection/correction Flow/congestion ... packet loss Research area: TCP ... TCP over wireless In the simple case, wireless links ...
Chapter 3: Transport Layer last revised 23/03/04 ... transport protocols run in end systems ... transport layer: logical communication between processes ...
Title: 3rd Edition: Chapter 3 Author: Jim Kurose & Keith Ross Last modified by: Edith Ngai Created Date: 10/8/1999 7:08:27 PM Document presentation format
Web caches (proxy server) user sets browser: Web accesses via cache ... request without involving origin server. client. Proxy. server. client. HTTP request ...
provide logical communication between app processes running on different hosts ... The Internet's network layer provides a best-effort, unreliable delivery service: ...
Chapter 3: Transport Layer. Transport-layer services. Multiplexing and ... Chapter 5: The Link Layer and Local Area Network. Error detection and correction ...
Communication networks can be classified based on how the nodes exchange information: ... UDP socket identified by two-tuple: (dest IP address, dest port number) ...
Sequence of A & B packets does not have fixed pattern statistical multiplexing. ... Client browses remote directory by sending commands over control connection. ...
Why UDP is better than TCP in some applications? How many ... What is a torrent file? A tracker in BitTorrent? Ethernet switch checks what layer's header? ...