Implementing Cisco Collaboration Cloud and Edge Infrastructure (CLCEI) — Question 125

How do the Cisco Expressway-C and Expressway-E servers transmit media to each other?

Answer options

• A. RTP and RTCP are multiplexed for all internal and external video endpoints across the traversal link using UDP.
• B. When the Expressway-C receives RTP and RTCP media, it establishes a new UDP socket with the Expressway-E.
• C. RTP and RTCP are multiplexed for all internal and external video endpoints across the traversal link using TLS.
• D. When the Expressway-E receives RTP and RTCP media, it establishes a new UDP socket with the Expressway-C.

Correct answer: A

Explanation

The correct answer is A because RTP and RTCP are indeed multiplexed over UDP for media transmission between Expressway servers. The other options incorrectly describe the mechanisms of media transmission, such as establishing new UDP sockets, which is not how the traversal link operates between these servers.