Information Technology Reference
In-Depth Information
21.
Which protocol is preferred for inter-PBX trunks?
a.
SS7
b.
RTP
c.
Q.SIG
d.
DTMF
22.
cRTP compresses the IP/UDP/RTP header to what size?
a.
2 or 4 bytes
b.
2 or 5 bytes
c.
40 bytes
d.
It compresses the RTP header only.
23.
The steps of converting an analog signal to digital format occur in which order?
a.
Sampling, filtering, digitizing
b.
Filtering, sampling, digitizing
c.
Digitizing, filtering, sampling
d.
Sampling, digitizing, filtering
24.
Digitizing is divided into which two processes?
a.
Filtering and sampling
b.
Expanding and filtering
c.
Companding, and quantizing and coding
d.
Sampling, and quantizing and coding
25.
Which of the following are goals of IP telephony?
a.
Use the existing IP infrastructure
b.
Provide lower cost of ownership
c.
Provide greater flexibility in voice communications
d.
All of the above
26.
An analysis of a 384-kbps WAN link shows complaints of voice quality issues be-
tween two sites when large file transfers take place. The circuit is running at 45 per-
cent utilization. What QoS schemes should be implemented to alleviate this?
a.
CQ and cRTP
b.
LFI and cRTP
c.
LLQ
d.
All of the above
