Cisco 400-051 Exam

Which protocol that is used between Cisco IM and Presence and Cisco Unified Communications Manager is responsible for the exchange of phone state presence information?

  • A. AXL/SOAP
  • B. CTI/QBE
  • C. SIP/SIMPLE
  • D. LDAP
  • E. XMPP
Answer: Option C.
Explanation: 

To provide interoperability between communications systems, SIP is the protocol leveraged. Enterprise Presence solutions need to provide for a uniform definition of the main communication services such as IM, voice, video, e-mail, web calendaring, and so on, while SIP delivers the necessary features.

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