An engineer must enable video desktop sharing between a Cisco Unified Communications Manager registered video endpoint and a Cisco VCS registered video endpoint. Which protocol must be enabled in SIP profile for VCS SIP trunk on Cisco Unified Communications Manager?
A. RDP
B. H.264
C. H.224
D. H.263
E. BFCP
What DrVoIP said.
E is correct. The giveaway is that they ask about video desktop sharing over SIP. Not just videoconferencing. BFCP (Binary Floor Control Protocol)
https://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-57/153-binary.html
The basic concept of floor control is analogous to managing a live in-person presentation, where you want to control who is presenting, manage and transition your presenters, and maintain a feedback loop. Also important is the ability to allow a presenter to show slides and share with your audience a white board or transparency projector.
A lot of dumps have the wrong answer as D which is really an MPEG 4 protocol, the correct answer is E Binary Floor Control Protocol and can be verified at this link
https://supportforums.cisco.com/t5/collaboration-voice-and-video/understanding-binary-floor-control-protocol-bfcp-with-wireshark/ta-p/3158882