SG 9 - Study Notecards

Question 1

What is a TCP Header?

Answer 1

• It’s the 1st 24 bytes of a TCP segment that contains the parameters and state of an end-to-end TCP socket
• Is used to track the state of communication between 2 TCP endpoints
• The TCP Header immediately follows the IP Header during transmission

TCP Header size ranges from 20 - 60 bytes

It contains info that is required for control purposes, such as: Source Port, Destination Port, Sequence Number, Acknowledgement Number, Header Length, Flags, Window Size, TCP Checksum and Urgent Pointer