A system administrator is setting up a file transfer server. The goal is to encrypt the user authentication and the files the user is sending using only a user ID and a key pair. Which of the following methods would achieve this goal?
A. AES B. IPSec C. PGP D. SSH
Answer: D
Explanation: With SSH you can use automatically generated public-private key pairs to encrypt a network connection, and then use password authentication to log on. Or you can use a manually generated public-private key pair to perform the authentication, allowing users or programs to log in without having to specify a password.