Which two statements about Expressway media traversal are true? (Choose two.)

Question

Options

• AExpressway Control is the traversal server installed in the DMZ.
• BThe Expressway Edge must be put in a firewall DMZ segment.
• CCisco Unified Communications Manager zone can be either traversal server or client.
• DThe Unified Communications traversal zone can be used for Mobile and Remote Access.
• EBoth Expressway Edge interfaces can be NATed.

• A
  6% (2)
• B
  88% (28)
• C
  3% (1)
• E
  3% (1)

Explanation

B is correct: Expressway-E (Edge) must be placed in a firewall DMZ segment because it is the component that communicates with both external Internet endpoints and internal network components, bridging across the firewall boundary. D is correct: The Unified Communications (UC) traversal zone is specifically designed for MRA deployments and supports the additional protocols (HTTPS, XMPP proxy, SIP) required for MRA. A is false: Expressway-C (Control) is the traversal CLIENT inside the network; Expressway-E (Edge) is the traversal SERVER in the DMZ - not Expressway-C. C is false: CUCM zones are neighbor zones, not traversal server or client roles. E is false: Typically only the external interface of Expressway-E is NATed; the internal interface connects directly to the DMZ network.

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