Which two protocols are used by Cisco Unified Presence? (Choose two.)

A.
SIP/SIMPLE

B.
XMPP

C.
SCCP

D.
PPPoX

E.
IMPP

Explanation:
The Skinny Call Control Protocol (SCCP, or short Skinny) is a proprietary network
terminal control protocol. PPPoX (PPP over X) designates a family of encapsulating
communications protocols implementing Point-to-Point Protocol.
Link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cups/8_0/english/install_upgrade/deployment/g
uide/dgoverview.html