CompTIA Security+ Question D-88

An administrator has two servers and wants them to communicate with each other using a secure algorithm.
Which of the following choose to provide both CRC integrity checks and RCA encryption?

A. NTLM
B. RSA
C. CHAP
D. ECDHE

Answer: D

Explanation:
ECDHE provides both CRC integrity checks and RCA encryption. Adding an ephemeral key to Elliptic Curve Diffie-Hellman turns it into ECDHE. It is the ephemeral component of each of these that provides the perfect forward secrecy. Forward secrecy is a property of any key exchange system, which ensures that if one key is compromised, subsequent keys will not also be compromised. Perfect forward secrecy occurs when this process is unbreakable.