Which four configuration settings are associated with dial-peer 0 (zero) on Cisco IOS-XE routers? (Choose four.)
Dial-peer 0 is a special dial-peer on Cisco IOS-XE routers, which is used as a fallback dial-peer when a call cannot be matched to any other dial-peers. Dial-peer 0 has default configuration settings that can be modified to suit specific requirements. The four configuration settings associated with dial-peer 0 are as follows:
A. VAD enabled: Voice Activity Detection (VAD) is a feature that detects when a person is speaking and when there is silence. When VAD is enabled, the router stops sending packets when there is silence, which conserves bandwidth. However, it can also result in the loss of some audio packets. VAD is enabled by default on dial-peer 0, but it can be disabled if necessary.
C. Fax-rate disabled: Fax machines use a different codec than regular voice calls, and they require a higher bandwidth to transmit data. By default, fax-rate is disabled on dial-peer 0, which means that fax calls will not be accepted. However, if fax calls need to be accepted, fax-rate can be enabled.
E. 729 CODEC: The G.729 codec is a compressed audio codec that is commonly used for VoIP calls. By default, G.729 is supported on dial-peer 0, which means that it can be used for calls that require it. However, other codecs can also be used depending on the specific requirements.
G. 711 CODEC: The G.711 codec is an uncompressed audio codec that is commonly used for VoIP calls. By default, G.711 is supported on dial-peer 0, which means that it can be used for calls that require it. However, other codecs can also be used depending on the specific requirements.
H. RSVP Support: Resource Reservation Protocol (RSVP) is a protocol used to reserve bandwidth for specific applications. By default, RSVP support is not enabled on dial-peer 0. However, if bandwidth reservation is required for a particular application, RSVP support can be enabled.
I. Fax-rate voice: Fax-rate voice is a feature that allows fax calls to be transmitted using a lower bandwidth codec, such as G.729. By default, fax-rate voice is not enabled on dial-peer 0, but it can be enabled if fax calls need to be transmitted using a lower bandwidth codec.
Therefore, the correct answers to the question are A (VAD enabled), C (Fax-rate disabled), E (729 CODEC), and G (711 CODEC).