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