Which two options should be used to create a secure traversal zone between the Expressway-C and Expressway-E? (Choose two.)
A. One Cisco Unified Communications traversal zone for H.323 and SIP connections.
B. Expressway-C and Expressway-E must trust each other's server certificate.
C. Enable username and password authentication verification on Expressway-E.
D. Create a set of username and password on each of the Expressway-C and Expressway-E to authenticate the neighboring peer.
E. A separate pair of traversal zones must be configured if an H.323 connection is required and Interworking is disabled.
Correct Answer: B, E
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