Which zone is required between Expressway-E and Expressway-C in Mobile and Remote Access deployments?

The correct answer is A. Unified Communications traversal zone. The Unified Communications (UC) traversal zone is the specific zone type required between Expressway-C and Expressway-E in MRA deployments. Unlike a standard traversal zone used for B2B calls, the UC traversal zone supports the additional protocols and services required for…

Mobile and Remote Access

Question

Options

AUnified Communications traversal zone
Bneighbor zone
CDNS zone
Dtraversal zone

How the community answered

(36 responses)

A
89% (32)
B
3% (1)
C
3% (1)
D
6% (2)

Explanation

The Unified Communications (UC) traversal zone is the specific zone type required between Expressway-C and Expressway-E in MRA deployments. Unlike a standard traversal zone used for B2B calls, the UC traversal zone supports the additional protocols and services required for MRA: it handles HTTPS for configuration provisioning, XMPP for IM and presence, and SIP for voice and video - all tunneled securely across the firewall. A standard neighbor zone (B) does not provide firewall traversal. A DNS zone (C) is used for external call routing via DNS SRV lookups. A generic traversal zone (D) supports B2B but lacks the MRA-specific UC protocol support.

Topics

#Expressway-E#Expressway-C#Mobile and Remote Access#Unified Communications Traversal Zone

Community Discussion

No community discussion yet for this question.

Full 300-820 Practice