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Cisco 642-432 Exam Syllabus Topics:

Cisco Voice Over IP Sample Questions:

1. Which process changes an internal extension into a fully qualified external PSTN number before matching to a dial peer?

A) prefix extension
B) number expansion
C) forward digits
D) digit masking

2. Your customer has forwarded this diagram and configuration. The customer wishes to have a connection between its PBXs, a connection that is created and dropped as required. There is one configuration statement missing from each router. What are the two missing statements? (Choose two.)

A) connection trunk 4045551200
B) connection trunk 2015551000404555?
C) connection tie-line 404555?
D) connection trunk
E) connection tie-line 4045551200
F) connection tie-line 2015551000

3. Refer to the exhibit. Select the recommended QoS configuration for the LAN segments of the network in the campus and branch office.

A) Configure a PQ with WRR.
Use ACLs to classify voice control traffic.
Isolate voice traffic in its own VLAN.
Configure access switches to trust traffic from IP phones.
B) Configure WRR with voice as highest priority.
Use ACLs to classify voice traffic.
Isolate voice traffic in its own VLAN .
Configure access switches to trust traffic from IP phones.
C) Configure a PQ with voice control as highest priority.
Use ACLs to classify voice control traffic.
Isolate voice control traffic in its own VLAN .
Configure access switches to trust voice control traffic from IP phones.
D) Configure a PQ with WRR.
Use ACLs to classify voice traffic.
Isolate voice traffic in its own VLAN.
Configure access switches to trust traffic from IP phones.

4. Which gateway interface connects to the standard station port of a PBX?

A) FXS
B) FXO
C) POTS
D) E&M

5. Which problem does a-law and mu-law address?

A) quantization produces higher signal-to-noise ratios at smaller amplitudes
B) encoding loses signal integrity at lower frequencies
C) quantization produces distortion at higher frequencies
D) encoding produces greater signal loss at higher amplitude

Solutions: