A security engineer, Joe, has been asked to create a secure connection between his mail server
and the mail server of a business partner. Which of the following protocol would be MOST
appropriate?

A.
HTTPS

B.
SSH

C.
FTP

D.
TLS

Explanation:
Transport Layer Security (TLS) is a cryptographic protocol designed to provide
communications security over a computer network. It uses X.509 certificates and hence
asymmetric cryptography to authenticate the counterparty with whom it is communicating, and to
exchange a symmetric key. The TLS protocol allows client-server applications to communicate
across a network in a way designed to prevent eavesdropping and tampering.