You are a messaging professional.

Your company deploys a Microsoft Exchange Server 2007 server and plans to implement the Edge
Transport server role on the perimeter network as shown in the following exhibit. (Refer to the Exhibit.)

The Edge Transport servers will relay e-mail messages between the Hub Transport servers on the
internal network and the Internet. Edge synchronizations must be activated between the Edge Transport
servers and the Hub Transport servers.

You need to configure the ports that the internal firewall requires for inbound and outbound access.

What should you do?

A.
Grant access from the internal network to the perimeter network on TCP port 25. Grant access from the
perimeter network to the internal network on TCP ports 389 and 636.

B.
Grant access from the internal network to the perimeter network on TCP ports 50389 and 50636. Grant
access from the perimeter network to the internal network on TCP port 25.

C.
Grant access from the internal network to the perimeter network on TCP port 25. Grant access from the
perimeter network to the internal network on TCP ports 50389 and 50636.

D.
Grant access from the internal network to the perimeter network on TCP ports 25, 50389, and 50636. Grant
access from the perimeter network to the internal network on TCP port 25.