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Practical Packet Analysis, 2nd Edition
book

Practical Packet Analysis, 2nd Edition

by Chris Sanders
June 2011
Intermediate to advanced content levelIntermediate to advanced
280 pages
7h 56m
English
No Starch Press
Content preview from Practical Packet Analysis, 2nd Edition

Transmission Control Protocol

The ultimate goal of the Transmission Control Protocol (TCP) is to provide end-to-end reliability for the delivery of data. TCP, which is defined in RFC 793, operates at layer 4 of the OSI model. It handles data sequencing and error recovery, and ultimately ensures that data gets where it is supposed to go. A lot of commonly used application-layer protocols rely on TCP and IP to deliver packets to their final destination.

The TCP Header

TCP provides a great deal of functionality, as reflected in the complexity of its header. As shown in Figure 6-16, the following are the TCP header fields:

Source Port The port used to transmit the packet.
Destination Port The port to which the packet will be transmitted.
Sequence Number ...
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Publisher Resources

ISBN: 9781593272661Errata