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642-845 PDF DEMO:
QUESTION NO: 1
What are the steps for configuring stateful NBAR for dynamic protocols?
A. Use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
B. Use the command match protocol rtp to allow identification of real-time audio and video traffic. Use the command ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbers.
C. Use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
D. Configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface.
E. Configure video streaming. Configure audio streaming. Attach the codec to an interface.
Answer: D
QUESTION NO: 2
Two sites are using a multisite centralized call processing model. The voice gateway on the remote branch has lost IP connectivity to its Cisco CallManager server. Which feature enables the remote gateway to take the role of the call agent during the WAN failure?
A. automated alternate routing (AAR)
B. Cisco CallManager Attendant Console
C. real-time protocol (RTP)
D. Survivable Remote Site Telephony (SRST)
Answer: D
QUESTION NO: 3
Refer to the exhibit. Both routers have been configured as VoIP gateways. They must also support traditional telephony devices to connect to analog telephones. Which two configuration changes would correctly support the voice requirements? (Choose two.)
A. On each router, under the dial-peer voice 1 pots configuration, add the port fa0/0 command.
B. On each router, under the dial-peer voice 1 pots configuration, add the port 1/0/0 command.
C. On each router, configure dial-peer voice 1 as a voip connection and configure dial-peer voice 2 as a pots connection.
D. Under the dial-peer voice 1 pots configuration, change the destination pattern of 1111 to 2222 on the
R1 router, and 2222 to 1111 on the R2 router.
E. Under the dial-peer voice 2 voip configuration, change the destination pattern of 1111 to 2222 on the
R1 router, and 2222 to 1111 on the R2 router.
F. Under the dial-peer voice 2 voip configuration, change the destination target address of 10.2.2.2 to
10.1.1.1 on the R1 router, and the destination target address of 10.1.1.1 to 10.2.2.2 on the R2 router.
Answer: BE
QUESTION NO: 4
Voice activity detection (VAD) suppresses the transmission of silence patterns. On average, and assuming that a link carries at least 24 calls, what percentage of total bandwidth could VAD save?
A. 5
B. 15
C. 25
D. 35
E. 45
F. 55
Answer: D
QUESTION NO: 5
To have the best possible voice quality and to utilize effectively the available bandwidth, which queuing and compression mechanisms need to be used? (Choose two.)
A. class-based weighted fair queuing (CBWFQ)
B. low latency queuing (LLQ)
C. priority queuing (PQ) or custom queuing (CQ)
D. Real-Time Transport Protocol (RTP) header compression
E. TCP header compression
F. UDP header compression
Answer: BD
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Updated: May 27, 2022