Which two enterprise presence domains can federate with Cisco IM and Presence by using SIP?
(Choose two.)

A.
AOL

B.
Microsoft OCS

C.
IBM Sametime

D.
Cisco WebEx Connect

E.
Google Talk

F.
Cisco Unified Presence 8.X Releases

Explanation:
Microsoft Lync and OCS support presence services with sip as well as AOL so to
sip is easy to troubleshoot and feasible for signaling that’s why cisco federate these with sip.