Which protocol that is used between Cisco IM and Presence and Cisco Unified Communications
Manager is responsible for the exchange of phone state presence information?

A.
AXL/SOAP

B.
CTI/QBE

C.
SIP/SIMPLE

D.
LDAP

E.
XMPP

Explanation:
To provide interoperability between communications systems, SIP is the protocol
leveraged. Enterprise Presence solutions need to provide for a uniform definition of
the main communication services such as IM, voice, video, e-mail, web calendaring, and
so on, while SIP delivers the necessary features.