How does the Expressway-C and Expressway-E communicate?

Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints.

How does the Expressway-C and Expressway-E communicate?
A . Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint.
B . Internal endpoints are registered to Expressway-E in the DM
C . Expressway-C, which is also in the DMZ, will receive and make calls on behalf of Expressway-E because they are in the same network.
D . Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint.
E . Internal endpoints are registered to Expressway-C in the DM
F . Expressway-E, which is also in the DMZ, will receive and make calls on behalf of Expressway-C because they are in the same network.

View Answer

Answer: A

Explanation:

Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/exwy_b_mra-expressway-deployment-guide/exwy_b_mra-expressway-deployment-guide_chapter_00.html