What is tie primary purpose of the Cisco Telepresence Interoperability Protocol (TIP)?
A.
It allows IP and ISDN endpoints to communicate with each other.
B.
It multiplexes multiple video and audio streams into a single audio and single video of
stream.
C.
It is used to allow video and voice calls to traverse the firewall.
D.
It allows SIP and H.323 endpoints to communicate with each other