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  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: May 31, 2026
  • Q & A: 257 Questions and Answers
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  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: May 31, 2026
  • Q & A: 257 Questions and Answers
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  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: May 31, 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. At what point in a VoIP network are the existing class of service or differentiated services code point values considered valid and are used throughout the rest of the network?

A) marking boundary
B) distribution layer
C) trust boundary
D) access layer


2. Calculate how many IP phone calls can be sent across a 64 kbps Frame Relay link that uses the
G.729 codec being sampled 50 times a second, 20 bytes a sample, and has 6 bytes of Frame Relay header overhead with no checksum and uses header compression.

A) 4
B) 7
C) 5
D) 3


3. Which three methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)

A) IP network security boundary
B) media flow-through
C) RSVP
D) IP network privacy
E) Intelligent IP address translation for RTP flows
F) Back-to-back user agent, replacing all SIP-embedded IP addressing


4. Which of these is "trusted" when the auto qos voip command is configured with the trust parameter on routers?

A) MAC address of sender
B) source address
C) DSCP
D) DES keyword


5. Which bandwidth percentage should the priority queue be given when configuring LLQ on a 256kb/s Frame Relay circuit? The circuit uses header compression with no checksums and FRF.12 so that five simultaneous G.729 calls can be completed.

A) 32 percent
B) 47 percent
C) 5 percent
D) 16 percent
E) 24 percent


Solutions:

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

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