单选题Your network contains an internal network and a perimeter network that are separated by a firewall. The perimeter network contains an Exchange 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 network Which TCP ports should you allow from the internal network to the perimeter network？（）A3389 and 25B3389 and 636C50636 and 25D50636 and 135
单选题
Your network contains an internal network and a perimeter network that are separated by a firewall. The perimeter network contains an Exchange 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 network Which TCP ports should you allow from the internal network to the perimeter network？（）
A
3389 and 25
B
3389 and 636
C
50636 and 25
D
50636 and 135
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