Question

IPSec is designed to provide security at the _________

(a) transport layer

(b) network layer

(c) application layer

(d) session layer

This question was addressed to me by my college director while I was bunking the class.

My question is taken from Security In The Internet topic in section Networking of Computer Network

Answer 1

The correct option is (b) network layer

Easy explanation: IPSec is a set of protocols used to provide authentication, data integrity and confidentiality between two machines in an IP network. In the TCP/IP model, it provides security at the IP layer i.e. the network layer.