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Cisco Voice Over IP Sample Questions:

1. 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
B) connection tie-line 2015551000
C) connection trunk 2015551000404555?
D) connection trunk 4045551200
E) connection tie-line 404555?
F) connection tie-line 4045551200

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

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

3. Refer to the exhibit. You have been asked to configure a dial peer on R2 that will match only the extensions of the four telephones attached. Which dial-peer statement will you use?

A) dial-peer voice 1 pots destination-pattern 5552.[0-5]0
B) dial-peer voice 1 pots destination-pattern 555[2-5][56]
C) dial-peer voice 1 pots destination pattern 5552[5-6].0
D) dial-peer voice 1 pots destination-pattern 5552[5-6][05]0

4. In a VoIP environment when speech samples are framed every 20 ms, a payload of 20 bytes is generated. Assuming a total packet length of 60 bytes, what is the length of the packet header if cRTP is deployed without redundancy checks?

A) 1 byte
B) 40 bytes
C) 20 bytes
D) 3 bytes
E) 2 bytes
F) 4 bytes

5. Which statement is true about VoIP packet loss?

A) Codec algorithms can overcome minimal packet loss.
B) Lost packets are simply retransmitted.
C) Even minimal packet loss causes echo.
D) IP phones can reconstruct up to three consecutive lost packets.

Solutions: