Appendix A. Answers to the Review Questions

1:

What two main protocols make up the IPSec framework?

A1:

Answer AH and ESP

2:

What IP protocol does ESP use?

A2:

Answer ESP is IP protocol 50.

3:

What are the two modes of IKE Phase 1?

A3:

Answer Main mode and aggressive mode

4:

What three key lengths can AES currently use?

A4:

Answer Currently, AES supports 128-, 192-, and 256-bit encryption keys.

5:

What type of VPN would you be using if you are a user based at home connecting to the central site over a VPN by using a VPN Software Client installed on your laptop computer?

A5:

Answer This type of VPN is classed as a remote-access VPN. This is because the VPN connection is created between the VPN Software Client and the VPN headend device at the central ...

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