Which zone is required on a B2B deployment between Expressway-C and Expressway-E?
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A. B. C. D.A.
In a business-to-business (B2B) deployment between two Cisco Expressway servers, the zone that is required is a traversal zone.
A traversal zone is a type of zone that allows communication between two different Unified Communications (UC) networks, in this case, the two Expressway servers. It enables secure traversal of voice, video, and data traffic over an untrusted network, such as the Internet, while still maintaining confidentiality and integrity.
The Expressway-C server is typically located inside the internal network of an organization, while the Expressway-E server is located in the DMZ or external network. The traversal zone acts as a secure link between these two servers, allowing external entities to communicate with internal UC applications and endpoints.
The traversal zone must be configured on both the Expressway-C and Expressway-E servers and must be configured with the same settings, such as authentication and encryption settings, to establish a secure communication channel between them.
In summary, the correct answer to the question is A. traversal zone, as it is the zone required on a B2B deployment between two Cisco Expressway servers to enable secure communication between them over an untrusted network.