Which two VoIP protocols use SDP to describe streaming media sessions? (Choose two.)
A.
SCCP
B.
H.323
C.
SIP
D.
MGCP
E.
RAS
F.
cRTP
Explanation:
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
[8]:
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.