Your network contains an internal network and a perimeter network that are separated by firewall.
The perimeter network ___________ Server 2010 Edge Transport server. You plan to deploy an
internal Exchange Server 2010 organization that meets the following requirements.
• Support EdgeSync synchronization
• Support encrypted delivery of outbound e-mail messages to the Edge Transport server
•Minimize the attack surface of the internal networkWhich TCP ports should you allow from the
internal network to the perimeter network?

A.
3309 and 25

B.
3309 and 636

C.
50636 and 25

D.
50636 and 135

Explanation:
LDAP: Port 50389/TCP
Secure LDAP: Port 50636/UDP
SMTP: Port 25/TCP
Optional: enable RDP: Port 3389/TCP