You deploy an Active Directory Federation Services (AD FS) Federation Service Proxy on a server named
Server1.
You need to configure the Windows Firewall on Server1 to allow external users to authenticate by usingAD FS.
Which protocol should you allow on Server1?

A.
Kerberos

B.
SSL

C.
SMB

D.
RPC

Explanation:
Reference:
MS Press – Self-Paced Training Kit (Exam 70-640) (2nd Edition, July 2012)
page 903
AD FS relies on secure HTTP communications by using SSL authenticationcertificates to verify the identity of
both the server and the client during communications. Because of this, all communications occur through port
443 over HTTPS.