'Duplicate ack' presentation slideshows

Reliable Data Transport over Heterogeneous Wireless Networks

Reliable Data Transport over Heterogeneous Wireless Networks. Hari Balakrishnan MIT Lab for Computer Science. Goal: To make wireless devices first-class Internet citizens. Motivation. Rapid growth. Cellular phones. But wireless data is floundering... Enormous heterogeneity

656 views • 64 slides

TCP over Wireless Networks

TCP over Wireless Networks. Raj Jain Washington University Saint Louis, MO 63131 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-06/. Overview. TCP: Key Features TCP Congestion Mechanisms Our Initial Research on TCP Congestion

633 views • 48 slides

The TCP Segment Header

The TCP Segment Header. TCP header length in 32 bit words, URG-urgent, ACK- ack number is valid, PSH-push, RST-reset connection, SYN-used to establish connection, FIN-used to release connection. The TCP Segment Header (2).

594 views • 44 slides

TCP over Wireless Networks

TCP over Wireless Networks. Raj Jain Professor of Computer Science and Engineering Washington University in Saint Louis Saint Louis, MO 63130 Audio/Video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse574-08/. Overview. TCP: Key Features

623 views • 44 slides

TCP: Overview RFCs: 793, 1122, 1323, 2018, 2581

386 views • 38 slides

Chapter 3 Transport Layer

CPE 400 / 600 Computer Communication Networks. Lecture 11. Chapter 3 Transport Layer. slides are modified from J. Kurose & K. Ross. 3.1 Transport-layer services 3.2 Multiplexing and demultiplexing 3.3 Connectionless transport: UDP 3.4 Principles of reliable data transfer

514 views • 36 slides

688 views • 33 slides

295 views • 29 slides

Lab

353 views • 25 slides

TCP continued

338 views • 24 slides

433 views • 23 slides

Chapter 6 TCP Congestion Control

Chapter 6 TCP Congestion Control. Networking CS 3470, Section 1. TCP Congestion Control. TCP congestion control introduced into the Internet in the late 1980s Roughly eight years after the TCP/IP protocol stack had become operational. TCP Congestion Control.

253 views • 23 slides

TCP Behavior and Performance

TCP Behavior and Performance. Workshop on QoS Hanoch Levy April 2003. IP and TCP. IP finds the way to send the packet is sent from end to end. IP is UNRELIABLE (pkts lost delayed) TCP: Transport Control Protocol Above IP Tasks: Guaranteed arrivals Flow control.

281 views • 20 slides

A Comparison of Mechanisms for Improving TCP Performance over Wireless Links

A Comparison of Mechanisms for Improving TCP Performance over Wireless Links. By: Hari B., Venkata P. et. al. Presented by: Nitin Bahadur. How I plan to keep you Awake. Review of TCP Congestion Control and Wireless issues Discussion of techniques presented in the paper

175 views • 17 slides

TCP sender (simplified)

NextSeqNum = InitialSeqNum SendBase = InitialSeqNum loop (forever) { switch(event) event: data received from application above create TCP segment with sequence number NextSeqNum if (timer currently not running) start timer

303 views • 15 slides

Chapter 3 outline

3.1 Transport-layer services 3.2 Multiplexing and demultiplexing 3.3 Connectionless transport: UDP 3.4 Principles of reliable data transfer. 3.5 Connection-oriented transport: TCP segment structure reliable data transfer flow control connection management

111 views • 11 slides

Transport Layer 2

139 views • 9 slides

Extending Snoop to Handle IPSec Packets

Extending Snoop to Handle IPSec Packets. Yan Yu AT&T Research / USC, UCLA Joint work with S. Bellovin, R. Caceres, K. Fisher, A. Rogers. The problem of using TCP in wireless networks. Major causes for losses in wireless networks lossy wireless links or hand-offs

186 views • 9 slides

Extending Snoop to Handle IPSec Packets

Extending Snoop to Handle IPSec Packets. Yan Yu AT&T Research / USC, UCLA Joint work with S. Bellovin, R. Caceres, K. Fisher, A. Rogers. The problem of using TCP in wireless networks. Major causes for losses in wireless networks lossy wireless links or hand-offs

185 views • 9 slides