June 2017
Intermediate to advanced
446 pages
10h 10m
English
Content preview from Mastering Python Networking
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TCP messages and data transfer
The biggest difference between TCP and User Datagram Protocol (UDP), which is its close cousin at the same layer, is that it transmits data in an ordered and reliable fashion. The fact that the operation guarantees delivery often referred to TCP as a connection-oriented protocol. It does this by first establishing a three-way handshake to synchronize the sequence number between the transmitter and the receiver, SYN, SYN-ACK, and ACK.
The acknowledgement is used to keep track of subsequent segments in the conversation. Finally at the end of the conversation, one side will send a FIN message, the other side will ACK the FIN message as well as send a FIN message of its own. The FIN initiator will then ACK the ...
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