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QUESTION 58

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 deploued without redundancy checks?
A. 1 byte
B. 2 bytes
C. 3 bytes
D. 4 bytes
E. 20 bytes
F. 40 bytes

Correct Answer: B
Section: (none)
Explanation

Explanation/Reference:

QUESTION 59
You are the network technician at Certkiller .com. VoIP isimplemented on the Certkiller network.

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QUESTION 40
How are inbound and outbound call legs handled from the perspective of the source router?

A. Only the inbound call leg is established by the source router.
B. Only the outbound call leg is established by the source router.
C. The inbound call leg and outbouond call leg are matched to the same dial peer.
D. The outbound call leg is matched first. Then, once the source is known, an inbound call leg is established.
E. The inbound call leg is matched first. Then, once the destination is known, an outbound call leg is established.

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QUESTION 34
Which statement is true about VoIP packet loss?
A. Lost packets are simply retransmitted.
B. Even minimal packet loss causes echo.
C. IP phones can reconstruct up to three consecutive lost packets.
D. Codec algorithms can overcome minimal packet loss.

Correct Answer: D Section: (none) Explanation
Explanation/Reference: QUESTION 35
Drop

A.
B.
C.

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QUESTION 40
How is CAS different on E1 and T1?
A. T1 has more signaling channels.
B. E1 CAS signaling is out-of-band while T1 is in-band.
C. E1 uses robbed-bit signaling.
D. T1 uses the D channel for CAS signaling.

Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 41
Site A uses three-digit internal numbers and Site B uses four-digit internal numbers. All calls to the PSTN are routed through Site B. What dial plan below best represents provision simplicity?
A. Translate all called numbers within Site A to four digits.

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