Which of the following statements is true about image sampling?
Answer(s): A
YUV 4:2:0 subsamples chroma by a factor of two in both horizontal and vertical dimensions, reducing total data to half of the full-resolution YUV 4:4:4 format.
Which of the following header fields is used to indicate the route of a response message?
The Via header records each hop a request takes and is used to route the corresponding response back along the same path.
FILL BLANKIn a SIP-only multipoint conference, when a participant sends the presentation, the system uses the ____________ protocol for presentation. (Enter the abbreviation.)
In SIP-only multipoint conferences, presentation content is delivered using the Binary Floor Control Protocol (BFCP), which handles floor control and content distribution.
The start line of a SIP response consists of three parts: method (Method), request URI (Request-URI), and protocol version (SIP-VERSION).
Answer(s): B
A SIP response start line is a Status-Line containing the SIP version, status code, and reason phrase - not the method and Request-URI.
SIP and SDP are independent of each other. SIP can implement multimedia calls independently to add new applications or media easily.
SIP relies on SDP for session description in multimedia calls; it cannot negotiate media parameters independently of SDP.
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