August 2018
Intermediate to advanced
466 pages
10h 23m
English
Content preview from Mastering Python Networking - Second Edition
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The transmission control protocol
The Transmission Control Protocol (TCP) is one of the main protocols used on the internet today. If you have opened a web page or have sent an email, you have come across the TCP protocol. The protocol sits at layer 4 of the OSI model, and it is responsible for delivering the data segment between two nodes in a reliable and error-checked manner. The TCP consists of a 160-bit header consisting of, among others, source and destination ports, a sequence number, an acknowledgment number, control flags, and a checksum:
TCP header
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