CompTIA Security+ Question E-46

An administrator needs to secure RADIUS traffic between two servers. Which of the following is the BEST solution?

A. Require IPSec with AH between the servers
B. Require the message-authenticator attribute for each message
C. Use MSCHAPv2 with MPPE instead of PAP
D. Require a long and complex shared secret for the servers

Answer: A

IPsec is used for a secure point-to-point connection traversing an insecure network such as the Internet. Authentication Header (AH) is a primary IPsec protocol that provides authentication of the sender’s data.