Cisco 642-437 : Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)

  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: May 30, 2026     Q & A: 257 Questions and Answers

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Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

1. Refer to the exhibit.

How does a switch port that receives marked traffic from a Cisco IP phone use the mls qos trust cos command?

A) The DSCP-to-CoS map is applied.
B) The CoS setting is modified according to the CoS-to-DSCP map.
C) For non-IP packets, the CoS is set to 7 and DSCP-to-CoS mapping is not applied.
D) CoS is used to select the ingress and egress queues.


2. What do you use an FXS for?

A) an E1
B) an IP phone
C) a PBX
D) an analog telephone


3. Which three are primary applications for classifying data on the network using QoS? (Choose three.)

A) transactional applications
B) mission-critical applications
C) best-effort applications
D) any applications
E) World Wide Web applications
F) database applications


4. A small office needs to provide outbound dialing and inbound DID without the cost of a T1 circuit. All signaling is loop-start. Which analog port configuration will support these requirements?

A) voice-port 0/1/0 signal did loop-start ! dial-peer voice 1 pots incoming called-number . ! dial-peer voice 90 pot destination-pattern 9T port 0/1/0
B) voice-port 0/0/0 signal did loop-start ! dial-peer voice 1 pots incoming called-number . direct-inward-dial ! dial-peer voice 90 pots destination-pattern 9T port 0/0/0
C) voice-port 0/0/0/ description fxs-did signal did loop-start ! voice-port 0/1/0 description fxo signal loop-start ! dial-peer voice 1 pots incoming called-number . direct-inward-dial port 0/0/0 ! dial-peer voice 90 pots destination-pattern 9T port 0/1/0
D) voice-port 0/0/0 signal loop-start ! voice-port 0/1/0 signal loop-start ! dial-peer voice 1 pots incoming called-number T direct-inward-dial ! dial-peer voice 90 pots destination-pattern 9T port 0/1/0


5. The file "apps31.9-1-1TH1-16.sbn" is located in the flash memory of the device. Which command should you enter on a Cisco IOS device to serve this file correctly using Trivial File Transfer Protocol?

A) tftp-server apps31.9-1-1TH1-16.sbn
B) tftp server:apps31.9-1-1TH1-16.sbn
C) tftp-server flash:apps31.9-1-1TH1-16.sbn
D) copy tftp flash:apps31.9-1-1TH1-16.sbn


Solutions:

Question # 1
Answer: B
Question # 2
Answer: D
Question # 3
Answer: A,B,C
Question # 4
Answer: C
Question # 5
Answer: C

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