LAN Switching and Wireless

361. In AMPS, each band is divided into __________ channels.

  1. 800
  2. 900
  3. 1000
  4. none of the above

Correct answer: (D)
none of the above

362. In an HFC network, the downstream data are modulated using the _________ modulation technique.

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

Correct answer: (B)
QAM

363. In an HFC network, the upstream data are modulated using the _________ modulation technique.

  1. QAM
  2. QPSK
  3. PCM
  4. ASK

Correct answer: (B)
QPSK

364. In an IS-95 system, the frequency-reuse factor is normally __________.

  1. 1
  2. 3
  3. 5
  4. 7

Correct answer: (A)
1

365. In an optical fiber, the inner core is _________ the cladding.

  1. denser than
  2. less dense than
  3. the same density as
  4. another name for

Correct answer: (A)
denser than

366. In asynchronous transmission, the gap time between bytes is _________.

  1. fixed
  2. variable
  3. a function of the data rate
  4. zero

Correct answer: (B)
variable

367. In ATM, _________ is for constant-bit-rate data.

  1. AAL1
  2. AAL2
  3. AAL3/4
  4. AAL5

Correct answer: (A)
AAL1

368. In ATM, _________ is for conventional packet switching (virtual-circuit approach or datagram approach).

  1. AAL1
  2. AAL2
  3. AAL3/4
  4. AAL5

Correct answer: (C)
AAL3/4

369. In ATM, _________ is for packets requiring no sequencing and no error control mechanism.

  1. AAL1
  2. AAL2
  3. AAL3/4
  4. AAL5

Correct answer: (D)
AAL5

370. In ATM, _________is for short packets.

  1. AAL1
  2. AAL2
  3. AAL3/4
  4. AAL5

Correct answer: (B)
AAL2

Previous
Page 37 of 71
Next
Copyright © EngineeringMCQ.com