In the Chat feature in Cisco Unified Presence, which protocol is used for communication between clients?

A.
XMPP

B.
XCP

C.
IRC

D.
XCPP

E.
XMMP

Explanation:
OK. StudentGuide Volume 3 Page 5-5
The chat feature is based on the Jabber Extensible Communications Platform (XCP), which uses XMPP as the chat protocol