Cisco 642-432 Questions & Answers - in .pdf
- Total Q&A: 72
- Update: May 30, 2026
- Price: $49.99
- Vendor: Cisco
- Exam Code: 642-432
- Exam Name: Cisco Voice Over IP
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Cisco 642-432 Q&A - Testing Engine
- Total Q&A: 72
- Update: May 30, 2026
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- Vendor: Cisco
- Exam Code: 642-432
- Exam Name: Cisco Voice Over IP
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Cisco Voice Over IP Sample Questions:
1. What is the function of a SIP registrar server?
A) resolves text addresses to IP addresses
B) resolves active endpoint addresses
C) acquires endpoint addresses
D) routes service requests
2. What is the approximate frequency range of human speech?
A) 20 Hz to 20,000 Hz
B) 600 Hz to 5400 Hz
C) 40 Hz to 15,000 Hz
D) 200 Hz to 9000 Hz
3. What is the E.164 numbering plan?
A) the European PBX standard telephony number plan
B) the IETF North American number plan
C) the ITU worldwide number plan
D) a proprietary PBX number plan
4. At what point does the MGCP call agent release the setup of the call path to the residential gateways?
A) after the call agent has been notified that an event occurred at the source residential gateway
B) after the call agent has sent a connection request to both the source and destination and has relayed a modify-connection request to the source so that the source and destination can set up the call path
C) does not release call path setup
D) after the call agent has forwarded session description protocol information to the destination from the source and has sent a modify connection to the destination and a create-connection request to the source
E) after the call agent has been notified of an event and has instructed the source residential gateway to create a connection
5. Which statement is true about VoIP packet loss?
A) IP phones can reconstruct up to three consecutive lost packets.
B) Lost packets are simply retransmitted.
C) Codec algorithms can overcome minimal packet loss.
D) Even minimal packet loss causes echo.
Solutions:
Question # 1
Answer: C | Question # 2
Answer: D | Question # 3
Answer: C | Question # 4
Answer: B | Question # 5
Answer: C |
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