SIP Federation between Cisco Unified Communications IM and Presence and Microsoft Skype for Business
Question
Which statement about SIP federation between Cisco Unified Communications IM and Presence and Microsoft Skype for Business is true?
Answers
Explanations
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A. B. C. D.A.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/interdomain_federation/12_5_1/cup0_b_interdomain-federation-1251/SIP federation is a way to connect two different Unified Communication systems, in this case, Cisco Unified Communications IM and Presence (CUCM IM&P) and Microsoft Skype for Business, to enable communication between users on both systems.
Option A, "Add the federated user as a contact in Jabber to view its presence status," is not entirely correct. While it is true that users can add federated users as contacts in Jabber, it is not the only way to view presence status. Users can also view presence status through the CUCM IM&P web interface or other supported clients.
Option B, "The role of SIP Proxy service is to process the XMPP packet in from Jabber and convert it to SIP," is not correct. The role of the SIP Proxy service is to handle SIP signaling messages between CUCM IM&P and Skype for Business.
Option C, "TLS is optional," is not correct. Transport Layer Security (TLS) is required for secure communication between CUCM IM&P and Skype for Business. Without TLS, communication between the two systems would be insecure and could potentially be intercepted or compromised.
Option D, "Use of directory URI as an IM addressing scheme is not supported," is not correct. Directory URI is a supported IM addressing scheme for SIP federation between CUCM IM&P and Skype for Business.
Therefore, none of the options are entirely correct, but the most accurate answer is option C, "TLS is optional," is false. TLS is required for secure communication between the two systems.
