You have a Windows Server Update Services (WSUS) server named Server1. Server1 synchronizes from
Microsoft Update.
You plan to deploy a new WSUS server named Server2. Server2 will synchronize updates from Server1.
Server2 will be separated from Server1 by a firewall.
You need to identify which port must be open on the firewall so that Server2 can synchronize the updates.
Which port should you identify?

A.
8530
B.
3389
C.
80
D.
443
Explanation:
https://technet.microsoft.com/en-GB/library/hh852346.aspx
The question doesn’t specify the OS version, but since this is a 2012 R2 exam, we can only come to one conclusion on that. On this version of the OS, the WSUS port is 8530 and 8531 for unencrypted and encrypted connections, respectively.
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