You work as the enterprise administrator at ABC.com. ABC.com has a domain named ABC.com. The ABC.com network servers run Microsoft Windows Server 2008. ABC.com has a computer named ABC-SR21 running Network Address Translation. During the course of the day ABC.com deploys an additional computer named ABC-SR22 to facilitate the launch of a new office.

How would you ensure administrative staff is able to connect to ABC-SR22 using Remote Desktop Protocol (RDP)?

A.
By configuring port forwarding on ABC-SR21 to forward to port 3389.

B.
By configuring port forwarding on ABC-SR21 to forward to port 110.

C.
By configuring port forwarding on ABC-SR21 to forward to port 21.

D.
By configuring port forwarding on ABC-SR21 to forward to port 80.

E.
By configuring port forwarding on ABC-SR21 to forward to port 443.

Explanation:
To ensure that administrators can access the server, ABC-SR21 by using Remote Desktop Protocol (RDP), you need to configure the ABC-SR01 to forward port 3389 to ABC-SR21.

The Remote Desktop Protocol is designed to work across TCP port 3389. If you are attempting to connect to a remote machine that sits behind a firewall, then the firewall must allow traffic to flow through TCP port 3389.

Reference: Troubleshooting Remote Desktop / The Remote Computer Cannot be Found

http://www.windowsnetworKing.com/articles_tutorials/Troubleshooting-Remote-Desktop.html