Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 13

Which description of RTP timestamps or sequence numbers is true?

Answer options

• A. The sequence number is used to detect losses.
• B. Timestamps increase by the time "carrying" by a packet.
• C. Sequence numbers increase by four for each RTP packet transmitted.
• D. The timestamp is used to place the incoming audio and video packets in the correct timing order (playout delay compensation).

Correct answer: D

Explanation

The correct answer is D because timestamps are essential for synchronizing media playback by ensuring that packets are played in the correct order. Option A is incorrect as sequence numbers do help detect losses but are not solely dedicated to that purpose. Option B misrepresents how timestamps function, while option C inaccurately describes the increment pattern of sequence numbers.