Question 47 of 490
Which two VoIP protocols use SDP to describe streaming media sessions? (Choose two.)
The Session Description Protocol (SDP), defined in RFC 2327, describes the content of sessions, including telephony, Internet radio, and multimedia applications.
SDP includes information about : Media streams: A session can include multiple streams of differing content.
SDP currently defines audio, video, data, control, and application as stream types, similar to the MIME types used for Internet mail.
Addresses: SDP indicates the destination addresses, which may be a multicast address, for a media stream.
Ports: For each stream, the UDP port numbers for sending and receiving are specified.
Payload types: For each media stream type in use (for example, telephony), the payload type indicates the media formats that can be used during the session.
Start and stop times: These apply to broadcast sessions, for example, a television or radio program.
The start, stop, and repeat times of the session are indicated.
Originator: For broadcast sessions, the originator is specified, with contact information.
This may be useful if a receiver encounters technical difficulties.