Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 194

Why would RTP traffic that is sent from the originating endpoint fail to be received on the far endpoint?

Answer options

• A. The far end connection data (c=) in the SDP was overwritten by deep packet inspection in the call signaling path.
• B. Cisco Unified Communications Manager invoked media termination point resources.
• C. The RTP traffic is arriving beyond the jitter buffer on the receiving end.
• D. A firewall in the media path is blocking TCP ports 16384-32768.

Correct answer: A

Explanation

The correct answer is A because deep packet inspection can modify the SDP information, causing the RTP stream to be misrouted. Option B is incorrect as media termination points do not directly cause RTP traffic failure. Option C is wrong because arriving after the jitter buffer doesn't necessarily mean the packets won't be received, just that they may be dropped. Option D discusses a firewall issue, but RTP typically uses UDP, not TCP, so it wouldn't apply to the specified ports.