LAN Switching and Wireless

301. In __________ coding, we divide our message into blocks, each of k bits, called __________.

1. block; blockwords
2. linear; datawords
3. block; datawords
4. none of the above

View answer

302. In __________ error correction, the receiver asks the sender to send the data again.

1. backward
2. retransmission
3. forward
4. none of the above

View answer

303. In __________ error correction, the receiver corrects errors without requesting retransmission.

1. backward
2. onward
3. forward
4. none of the above

View answer

304. In __________________, each packet is treated independently of all others.

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

View answer

305. In _________, a station monitors the medium after it sends a frame to see if the transmission was successful. If so, the station is finished. If, however, there is a collision, the frame is sent again.

1. CSMA/CA
2. CSMA/CD
3. either (a) or (b)
4. both (a) and (b)

View answer

306. In _________, autonegotiation allows two devices to negotiate the mode or data rate of operation.

1. Standard
2. Fast Ethernet
3. Gigabit Ethernet
4. Ten-Gigabit Ethernet

View answer

307. In _________, collisions are avoided through the use of three strategies: the interframe space, the contention window, and acknowledgments.

1. CSMA/CA
2. CSMA/CD
3. either (a) or (b)
4. both (a) and (b)

View answer

308. In _________, each station is allocated a band to send its data. In other words, each band is reserved for a specific station, and it belongs to the station all the time.

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

View answer

309. In _________, each station is allocated a time slot during which it can send data. Each station transmits its data in its assigned time slot.

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

View answer

310. In _________, each station is forced to send only at the beginning of the time slot.

1. pure ALOHA
2. slotted ALOHA
3. both (a) and (b)
4. neither (a) nor (b)

View answer