Refer to the exhibit. Which three statements about when user A calls user using SIP are true? (Choose three.)

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Refer to the exhibit.

Which three statements about when user A calls user using SIP are true? (Choose three.)

Refer To The Ex 1 (44.74 KiB) Viewed 52 times

A. SIP TCP/TLS ports must be opened from internal to DMZ and vice versa.
B. Deploying a Cisco VCS Expressway behind a NAT mandates the use of the Advanced Networking option key.
C. Cisco VCS Control and Cisco VCS Expressway support static NAT.
D. Deploying a Cisco VCS Control inside a NAT mandates the use of the Advanced Networking option key.
E. RTР and RTCP ports must be opened at the firewall from internal to DMZ and vice versa
F. The NAT device must translate from 10.X.X X to 193.1.1.X and vice versa.