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CCNT

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QUESTION: 491

What is the H.26x series of standards for?

1. Data transmissions

2. Video transmissions

3. Audio transmissions

4. All of the above

Answer: B

QUESTION: 492

What series of standards define video transmissions?

1. T.120

2. G.7xx

3. H.26x

4. All of the above

Answer: C

QUESTION: 493

What does the H.323 protocol suite do?

1. Provides the framework for capabilities matching

2. Mandates specific implementations/deployment

3. Limits media stream format and content

4. All of the above

Answer: Pending. Please put your suggestions to terry@

QUESTION: 494

Which of these statements is true?

1. H.323 provides a connection setup protocol.

2. H.323 does not mandate address mapping.

3. H.323 defines operating elements and relationships.

4. All of the above.

Answer: D

QUESTION: 495

Pulse code modulation for audio transmissions is defined by the standard.

A. H.261 and G.711 B. G.722 and H.261 C. G.711 and G.722

D. T.13 and G.722

Answer: C

QUESTION: 496

Pulse code modulation (PCM), as used with audio transmissions, is defined within the

series of standards.

1. H.26x

2. G.7xx

3. T.1xx

4. RSVP

Answer: C

QUESTION: 497

The G.711 and G.722 standards relate to for audio transmissions.

1. Pulse code modulation

2. Port-oriented multiplexing

3. Bandwidth compression

4. Packet prioritization

QUESTION: 498

Which of these statements is true?

1. Video transmissions are regulated by the H.26x series of standards.

2. The four formats that define video picture size are included in the H.263 standard.

3. The H.26x series of standards is part of the H.323 protocol suite.

4. All of the above.

Answer: Pending. Please put your suggestions to terry@

QUESTION: 499

The four formats that define video picture size are included in what standard?

A. G.723.1 B. H.261 C. T.120 D. H.263

Answer: D

QUESTION: 500

Which of these statements is true?

1. H.263 defines one standard picture size for video transmissions.

2. The H.26x series of standards regulates video transmissions.

3. The H.26x series of standards is part of the T.120 protocol suite.

4. All of the above.

Answer: Pending. Please put your suggestions to terry@

QUESTION: 501

The DiffServ protocol

1. Reserves network capacity before session initialization.

2. Allows different priorities for voice packets than for other packets.

3. Provides QoS at Layer 2 for Ethernet networks.

4. Provides for voice quality by limiting bandwidth of non-voice packets.

Answer: Pending. Please put your suggestions to terry@

QUESTION: 502

The QoS protocol which assigns different priorities to different kinds of packets is called

1. IntServ.

2. RSVP.

3. IEEE 802.11b.

4. DiffServ.

Answer: D

QUESTION: 503

Which of the following is true of DiffServ?

1. It uses IEEE 802.1 framing bits to prioritize frames.

2. It uses "type of service" bits in the IP header to prioritize packets.

3. It reserves bandwidth at the beginning of a call.

4. It is part of the RSVP method of providing QoS.

Answer: Pending. Please put your suggestions to terry@

QUESTION: 504

Establishing a dedicated end-to-end circuit for real-time voice, video, and data communications is part of which standard?

A. H.325 B. T.120 C. H.263

D. RSVP

QUESTION: 505

Which standard will allow users to "reserve" a dedicated end-to-end circuit for real-time voice, video, and data communications?

A. T.120 B. H.263

C. RSVP D. G.723.1

Answer: C

QUESTION: 506

The RSVP standard is for

1. Establishing a dedicated end-to-end circuit for real-time voice, video, and data communications.

2. Providing supplemental services, such as PBX features.

3. Defining run-time protocols and port-oriented multiplexing.

4. All of the above.

Answer: Pending. Please put your suggestions to terry@