Which certificate is used for XMPP interdomain federation when connecting to an externally federated domain?

Secure XMPP communication is required for XMPP federation with external domains and the Cisco IM and Presence.

Which certificate is used for XMPP interdomain federation when connecting to an externally federated domain?
A . cup
B . cup-xmpp
C . cup-xmpp-s2s
D . Tomcat

Answer: B

Explanation:

Reference: https://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/vcs/config_guide/X8-2/XMPP-Federation-with-Cisco-VCS-and-IM-and-Presence-Service.pdf