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300-820 · Question #121
300-820 Question #121: Real Exam Question with Answer & Explanation
The correct answer is A: An Expressway-C communicates with the internal endpoint and forwards the media to and from. See the full explanation below for the reasoning.
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Question
Which two internal SIP endpoints behind a firewall place calls to external devices? (Choose two.)
Options
- AAn Expressway-C communicates with the internal endpoint and forwards the media to and from
- BA Cisco Endpoint is configured with a publicly routable static NAT SIP address to advertise
- CAn Expressway-C communicates directly with the remote party using the ICE protocol
- DAn Expressway-E is used as a VPN server to allow remote SIP edge servers to connect calls
- EAn Expressway-C rewrites the SIP SDP to advertise its own IP address to the external party.
Topics
#Expressway-C Function#SIP Static NAT#External Call Routing#Media Path Management
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