Implementing Cisco Collaboration Cloud and Edge Infrastructure (CLCEI) — Question 110

Which two internal SIP endpoints behind a firewall place calls to external devices? (Choose two.)

Answer options

• A. An Expressway-C communicates with the internal endpoint and forwards the media to and from an Expressway-E.
• B. A Cisco Endpoint is configured with a publicly routable static NAT SIP address to advertise instead of is private IP address.
• C. An Expressway-C communicates directly with the remote party using the ICE protocol
• D. An Expressway-E is used as a VPN server to allow remote SIP edge servers to connect calls
• E. An Expressway-C rewrites the SIP SDP to advertise its own IP address to the external party.

Correct answer: A, B

Explanation

The correct answers A and B describe configurations that allow internal SIP endpoints to connect with external devices. Option A shows how an Expressway-C can facilitate communication with external calls by using an Expressway-E, while option B highlights the use of a public NAT address for a Cisco Endpoint. The other options either describe different functionalities or do not directly relate to placing calls to external devices.