Which two security services are provided by the Phone Proxy function on a Cisco ASA appliance?
(Choose two.)

A.
It provides interworking to ensure that external IP phone traffic is encrypted, as long as the Cisco
Unified Communications Manager cluster runs in secure mode.

B.
It only applies to encrypted voice calls where both parties utilize encryption.

C.
It manipulates the call signaling to ensure that all media is routed via the adaptive security
appliance.

D.
It supports encrypted TFTP operation of IP phone configuration files.

E.
It intercepts and authenticates soft clients before they reach Cisco Unified Communications
Manager clusters.

F.
It requires a remote routing device with an IPsec VPN tunnel.

Explanation:

When using TLS Proxy, the Cisco ASA appliance is inserted between the phones and Cisco Unified
Communications Manager. The phones will now establish a TLS session with the ASA appliance. The
appliance will, in turn, establish a proxy TLS connection with Cisco Unified Communications Manager
on the phone’s behalf. This function generates two TLS sessions.