LAN Switching and Wireless

211. Both Go-Back-N and Selective-Repeat Protocols use a _________.

1. sliding frame
2. sliding window
3. sliding packet
4. none of the above

View answer

212. Byte stuffing means adding a special byte to the data section of the frame when there is a character with the same pattern as the _________.

1. header
2. trailer
3. flag
4. none of the above

View answer

213. Checksums use __________ arithmetic.

1. two's complement arithmetic
2. one's complement arithmetic
3. either (a) or (b)
4. none of the above

View answer

214. Circuit switching takes place at the _________ layer.

1. data line
2. physical
3. network
4. transport

View answer

215. Communication between a computer and a keyboard involves __________________ transmission.

1. simplex
2. half-duplex
3. full-duplex
4. automatic

View answer

216. D-AMPS uses __________ to divide each 25-MHz band into channels.

1. FDMA
2. TDMA
3. CDMA
4. both (a) and (b)

View answer

217. Data can be _________.

1. analog
2. digital
3. (a) or (b)
4. none of the above

View answer

218. Data flow between two devices can occur in a _________ way.

1. simplex
2. half-duplex
3. full-duplex
4. all of the above

View answer

219. Data from a computer are _________; the local loop handles _________ signals.

1. analog; analog
2. analog; digital
3. digital; digital
4. digital; analog

View answer

220. Data link control deals with the design and procedures for _________ communication.

1. node-to-node
2. host-to-host
3. process-to-process
4. none of the above

View answer