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質問 1：
What is the advantage of line doubling?
A. It requires less power than conventional technology.
B. It offers feature-rich telephony functions, conferencing, and collaborative consulting.
C. It enables offsite workers with access to only one phone line to transmit data and make calls at the same time.
D. It requires less effort for moves and changes.
正解：C
質問 2：
Interswitch signaling is analogous to the network interface in:
A. Data networks.
B. CCS signaling.
C. In-band signaling.
D. SS7 networks.
正解：A
質問 3：
Why is quality of service important for the success of VoIP?
A. A company will save money only if workers use VoIP instead of making long-distance phone calls.
B. Workers will use regular long-distance service if they have trouble making connections with VoIP.
C. All of the above.
D. Workers will not use VoIP if the voice quality is poor.
正解：A
質問 4：
For the 'PC phone to PC phone' application, which of the following statements is true?
A. The PCs perform the gateway functions, so an outside gateway is not required.
B. As long as the PC has a sound card, speakers, and a microphone, the telephony technology is all software.
C. The application will work if the PC has a phone card and is used with a regular telephone.
D. All of the above.
正解：D
質問 5：
The DiffServ protocol:
A. Provides for voice quality by limiting bandwidth of non-voice packets.
B. Provides QoS at Layer 2 for Ethernet networks.
C. Reserves network capacity before session initialization.
D. Allows different priorities for voice packets than for other packets.
正解：C
質問 6：
What is time-division multiplexing?
A. It is an analog transmission technique that provides separate circuits for data, video, and voice.
B. It is an analog transmission technique that combines signals for transmission over a single circuit.
C. It is a digital transmission technique that provides separate circuits for data, video, and voice.
D. It is a digital transmission technique that combines signals for transmission over a single circuit.
正解：D
What is the advantage of line doubling?
A. It requires less power than conventional technology.
B. It offers feature-rich telephony functions, conferencing, and collaborative consulting.
C. It enables offsite workers with access to only one phone line to transmit data and make calls at the same time.
D. It requires less effort for moves and changes.
正解：C
質問 2：
Interswitch signaling is analogous to the network interface in:
A. Data networks.
B. CCS signaling.
C. In-band signaling.
D. SS7 networks.
正解：A
質問 3：
Why is quality of service important for the success of VoIP?
A. A company will save money only if workers use VoIP instead of making long-distance phone calls.
B. Workers will use regular long-distance service if they have trouble making connections with VoIP.
C. All of the above.
D. Workers will not use VoIP if the voice quality is poor.
正解：A
質問 4：
For the 'PC phone to PC phone' application, which of the following statements is true?
A. The PCs perform the gateway functions, so an outside gateway is not required.
B. As long as the PC has a sound card, speakers, and a microphone, the telephony technology is all software.
C. The application will work if the PC has a phone card and is used with a regular telephone.
D. All of the above.
正解：D
質問 5：
The DiffServ protocol:
A. Provides for voice quality by limiting bandwidth of non-voice packets.
B. Provides QoS at Layer 2 for Ethernet networks.
C. Reserves network capacity before session initialization.
D. Allows different priorities for voice packets than for other packets.
正解：C
質問 6：
What is time-division multiplexing?
A. It is an analog transmission technique that provides separate circuits for data, video, and voice.
B. It is an analog transmission technique that combines signals for transmission over a single circuit.
C. It is a digital transmission technique that provides separate circuits for data, video, and voice.
D. It is a digital transmission technique that combines signals for transmission over a single circuit.
正解：D
Inoue -
ても読みやすく、
解りやすく解説しています。とにかくやる気が起こるCCNTテキストです。