LAN Switching and Wireless

321. In _________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.

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

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322. In _________, the resources need to be reserved during the setup phase; the resources remain dedicated for the entire duration of data transfer phase until the teardown phase.

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

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323. In _________, the sequences are generated using orthogonal codes such the Walsh tables.

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

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324. In _________, the station configuration is unbalanced. We have one primary station and multiple secondary stations.

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

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325. In _________, the stations share the bandwidth of the channel in time.

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

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326. In _________, the stations use different codes to achieve multiple access.

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

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327. In _________, there is no resource allocation for a packet.

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

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328. In _________, we combine signals from different sources to fit into a larger bandwidth.

1. spread spectrum
2. line coding
3. block coding
4. none of the above

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329. In _________signaling, a portion of the bandwidth is used for signaling and another portion for data.

1. in-band
2. out-of-band
3. mixed
4. none of the above

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330. In _________encoding, we use three levels: positive, zero, and negative.

1. unipolar
2. bipolar
3. polar
4. none of the above

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