LAN Switching and Wireless

281. In _________ methods, a station cannot send unless it has been authorized by other stations.

1. random access
2. controlled access
3. channelization
4. none of the above

View answer

282. In _________ methods, no station is superior to another station and none is assigned the control over another.

1. random access
2. controlled access
3. channelization
4. none of the above

View answer

283. In _________ methods, the stations consult one another to find which station has the right to send.

1. random access
2. controlled access
3. channelization
4. none of the above

View answer

284. In _________ protocols, we use _________.

1. character-oriented; byte stuffing
2. character-oriented; bit stuffing
3. bit-oriented; character stuffing
4. none of the above

View answer

285. In _________ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

1. polar
2. bipolar
3. unipolar
4. all of the above

View answer

286. In _________ signaling, the same circuit is used for both signaling and data.

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

View answer

287. In _________ switching, the paths in the circuit are separated from one another spatially.

1. time-division
2. space-division
3. two-dimensional
4. three-dimensional

View answer

288. In _________ TDM, each input connection has an allotment in the output even if it is not sending data.

1. synchronous
2. statistical
3. isochronous
4. none of the above

View answer

289. In _________ TDM, slots are dynamically allocated to improve bandwidth efficiency.

1. synchronous
2. statistical
3. isochronous
4. none of the above

View answer

290. In _________ there are no setup or teardown phases.

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

View answer