which International Telecommunication Union (ITU) standard provides a framework for multimedia protocols for the transport of voice, video, and data over packetswitched networks?

For the following options, which International Telecommunication Union (ITU) standard provides a
framework for multimedia protocols for the transport of voice, video, and data over packetswitched networks?

A.
Weighted fair queuing (WFQ)

B.
H.323

C.
Voice over IP (VoIP)

D.
Session Initiation Protocol (SIP)