F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

TCP Internals: 3-way Handshake and Sequence Numbers Explained

In this article, I will explain and show you what really happens during a TCP 3-way handshake as captured by tcpdump tool. We'll go deeper into details of TCP 3-way handshake (SYN, SYN/ACK and ACK) ...

Published Nov 01, 2019

Version 1.0

Cirrocumulus

Joined May 15, 2019

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Nov 26, 2019

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F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

TCP Internals: 3-way Handshake and Sequence Numbers Explained

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