Which of the following ports should be used by a system administrator to securely manage a
remote server?

A.
22

B.
69

C.
137

D.
445

Explanation:
Secure Shell (SSH) is a more secure replacement for Telnet, rlogon, rsh, and rcp. SSH can be
called a remote access or remote terminal solution. SSH offers a means by which a commandline, text-only interface connection with a server, router, switch, or similar device can be
established over any distance. SSH makes use of TCP port 22.