CCSP Self-Study: Cisco Secure Virtual Private Networks (CSVPN), Second Edition

Appendix A. Answers to the Review Questions

Chapter 1

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 ...