Which two protocols does the Cisco IM Presence service use to federate with external domains? (Choose two.)
A . XMPP
B . SNMP
C . SIP
D . SCCP
E . SMPP
Answer: A,C
Explanation:
Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cucm/im_presence/interdomain_federation/11_5_1/cup0_b_interdomain-federation-guide-imp-115.pdf