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

Which two statements about Expressway media traversal are true? (Choose two.)
A . Expressway Control is the traversal server installed in the DMZ.
B . The Expressway Edge must be put in a firewall DMZ segment.
C . Cisco Unified Communications Manager zone can be either traversal server or client.
D . The Unified Communications traversal zone can be used for Mobile and Remote Access.
E . Both Expressway Edge interfaces can be NATed.

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Answer: BD