pseudo header in UDP/TCP

What is the aim of adding pseudo header in UDP/TCP.Why they are using pseudo header in Checksum calculation.

You can read all about the Pseudo Header and why its used in the checksum calculation by reading our article : www.firewall.cx/tcp-analysis-section-5.php

Please note, I've also removed your double post in the Cisco Lab as its obviously not the best place to ask about the pseudo header


I'm confident the above article will answer all your questions.


Cheers,