Which two options are functionalities of subzones in a Cisco VCS deployment? (Choose two.)

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Which two options are functionalities of subzones in a Cisco VCS deployment? (Choose two.)

A. Resolve names outside of the direct control of the Cisco VCS that exist on the public Internet.
B. Connect to another Cisco VCS on the same side of the firewall to extend dialing capabilities.
C. Traverse a firewall from a protected network to a public or DMZ network.
D. Apply registration, authentication, and media encryption policies.
E. Manage bandwidth to restrict standard definition endpoints from using more than 2 Mb of bandwidth.