82 Chapter 4 ■ Communication and Network Security (Domain 4)
- Brian is selecting an authentication protocol for a PPP connection. He would like to select
an option that encrypts both usernames and passwords and protects against replay using
a challenge/response dialog. He would also like to reauthenticate remote systems periodi-
cally. Which protocol should he use?
A. PA P
B. CHAP
C. EAP
D. LEAP - Which one of the following protocols is commonly used to provide backend authentication
services for a VPN?
A. HTTPS
B. RADIUS
C. ESP
D. AH - What network topology is shown in the following image?
A. A ring
B. A bus
C. A star
D. A mesh