LAN Switching and Wireless

311. In _________, each station transmits its data in its assigned time slot.

1. FDMA
2. TDMA
3. CDMA
4. none of the above

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312. In _________, resources are allocated on demand.

1. datagram switching
2. circuit switching
3. frame switching
4. none of the above

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313. In _________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant.

1. ASK
2. PSK
3. FSK
4. QAM

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314. In _________, the available bandwidth is divided into frequency bands.

1. FDMA
2. TDMA
3. CDMA
4. none of the above

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315. In _________, the chance of collision can be reduced if a station senses the medium before trying to use it.

1. MA
2. CSMA
3. FDMA
4. CDMA

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316. In _________, the change or lack of change in the level of the voltage determines the value of the bit.

1. NRZ-I
2. NRZ-L
3. both (a) and (b)
4. neither (a) nor (b)

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317. In _________, the configuration is balanced. The link is point-to-point, and each station can function as a primary and a secondary.

1. ABM
2. NRM
3. ARM
4. NBM

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318. In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant.

1. ASK
2. PSK
3. FSK
4. QAM

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319. In _________, the level of the voltage determines the value of the bit.

1. NRZ-I
2. NRZ-L
3. both (a) and (b)
4. neither (a) nor (b)

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320. In _________, the peak amplitude of one signal level is 0; the other is the same as the amplitude of the carrier frequency.

1. PSK
2. OOK
3. FSK
4. none of the above

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