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QUESTION 21
The H.264 supports which of the following frame rates?
A. 30, 10 only
B. 30, 15, 12, 7.5 only
C. 30, 15, 10, 7.5, 6, 5, 4, 3, 2, and 1
D. 30, 10, 7.5, 6 only
Correct Answer: C
QUESTION 22
MPEG4 Part 10 (H.264) coder requires what network data rate to sustain full motion video at SIF resolution?
A. More than 10,000 kilobits per second
B. More than 3,000 kilobits per second
C. Less than 1 kilobit per second
D. Less than 384 kilobits per second
Correct Answer: D
QUESTION 23
The G.723.1 uses which bit rates?
A. 8 and 16 kilobytes per second
B. 5.3 and 6.3 kilobytes per second
C. 5.3 and 6.3 kilobits per second
D. 12 and 24 kilobits per second
E. 8 and 16 kilobits per second
Correct Answer: C
QUESTION 24
Browsing sites and Managing Multipoint Conferences from the Video End Point is part of which standard?
A. H.233
B. H.243
C. H.234
D. H.242
E. H.281
Correct Answer: B
QUESTION 25
Network Address Translation works in which OSI Layer?
A. Layer 4
B. Layer 3
C. Layer 5
D. None of the other alternatives apply.
Correct Answer: B
QUESTION 26
SIF resolution is
A. 144 lines.
B. 240 lines.
C. 96 lines.
D. 288 lines.
E. 480 lines.
Correct Answer: B
QUESTION 27
Which ISDN service is capable of delivering 56K or 64K Constant Bit Rate circuits?
A. Circuit Switched Data
B. Low Speed Packet Switching
C. High Speed Packet Switching
D. Circuit Switched Video
E. Circuit Switched Voice
Correct Answer: A
QUESTION 28
Which of the following correctly describes the purpose of an Acoustic Echo Canceller (AEC)?
A. An AEC reduces the room loudspeaker contribution to the local microphone sent to the far-end.
B. An AEC provides a means to reduce room noise sent to the far-end.
C. An AEC provides compensation for room acoustics to improve microphone sensitivity and gain.
D. An AEC provides a means to reduce room reverberation as heard by the far-end.
E. An AEC provides compensation for room acoustics to better allow the reduction of echo returned to the far-end.
Correct Answer: AE
QUESTION 29
How many “Groups of Blocks” are used to create the Full CIF resolution?
A. 3
B. 12
C. 48
D. 10
Correct Answer: B
QUESTION 30
Which H.263 Annex is used to implement 60 / 50 Fields per Second Intra Video -Sync Operation?
A. Annex W
B. Annex F
C. Annex Q
D. Annex P
E. Annex N
Correct Answer: A
QUESTION 31
Select three of the following networks types that are “Full Duplex”.
A. Ethernet Switch interfaces
B. Ethernet BUS cable interfaces
C. ISDN B-Channels
D. One Coaxial Cable
E. S/T Reference point
F. Ethernet HUB interfaces
Correct Answer: ACE
QUESTION 32
Which of the following most accurately defines white balance?
A. A feature that splits the signal between the red, green, and blue components to make white
B. The amount of white pixels that appear in a video frame
C. A feature that adjusts the signal between the red, green, and blue components that yield white video signals.
D. A feature that eliminates noises distributed uniformly over the frequency spectrum
Correct Answer: C
QUESTION 33
Which of the following is the channel used to carry the signaling for H.320 Terminals?
A. Initial Channel
B. Bearer Channel
C. Data Channel
D. Audio Channel
Correct Answer: A
QUESTION 34
Which of the following are the Audio and Video Multiplexing, Transport, and Control / Communications procedures for H.320?
A. H.221 / H.242
B. H.221 / H.241
C. H.224 / H.244
D. H.225 / H.245
Correct Answer: A
QUESTION 35
Which ITU-T Standard describes the MCU or Video Bridge for Audio Visual Terminals?
A. H.241
B. H.231
C. H.242
D. G.711
E. 722
F. H.230
Correct Answer: B
QUESTION 36
Digital Access Cross-Connect Systems are used for Networks that are
A. Packet Network Routers.
B. Ethernet Switches.
C. Dedicated Digital Channel Time Division Multiplexing Networks.
D. Switched Digital Channel Multiplexing Networks.
Correct Answer: C
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