The Ajax security policy states that all endpoint devices should minimize the chance of traffic interception. To cover this point, which three things should be done in the design of the Cisco Unified Communication solution for Ajax? (Choose three.)

A.
DeploySRTP.

B.
Have each IP phone authenticate with the Cisco Unified Communications Manager cluster.

C.
Encrypt all voice control traffic.

D.
Disable the settings button on all phones that are in lobbies, break areas, or where there is no user assigned.

E.
Disable web access to all IP phones.

F.
Use SSH for communication to all Cisco Unified Communications Manager servers.