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G1071 Pages: 2

segment header.

What are the main features of UDP? Explain.

Explain the various congestion control mechanisms to alleviate congestion after it
happens.

Explain the services offered by TCP to the processes at the application layer.
With the help of a diagram, explain how users download the email message using
POP3.

What is the need of the second layer of defence in a secured network
environment? Explain.

Explain the functionality of 2) MIME b) SMTP c) HTTP.

Explain the handshake protocol used in SSL.

What is IPSec? Explain the two modes of operation of IPSec.

TOK KK

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