LAN Switching and Wireless

651. Unipolar, bipolar, and polar encoding are types of _________ encoding.

  1. line
  2. block
  3. NRZ
  4. Manchester

Correct answer: (A)
line

652. VCIs in Frame Relay are called _________.

  1. PVC
  2. SVC
  3. DLCIs
  4. none of the above

Correct answer: (C)
DLCIs

653. VLANs can_________.

  1. reduce network traffic
  2. provide an extra measure of security
  3. either (a) or (b)
  4. both (a) and (b)

Correct answer: (D)
both (a) and (b)

654. VLANs create _________ domains.

  1. unicast
  2. multicast
  3. broadcast
  4. none of the above

Correct answer: (C)
broadcast

655. We add r redundant bits to each block to make the length n = k + r. The resulting n-bit blocks are called __________.

  1. datawords
  2. blockwords
  3. codewords
  4. none of the above

Correct answer: (C)
codewords

656. We can divide _________ into two different schemes: synchronous or statistical.

  1. FDM
  2. TDM
  3. WDM
  4. none of the above

Correct answer: (B)
TDM

657. We can divide coding schemes into two broad categories: __________ and __________ coding.

  1. block; linear
  2. linear; nonlinear
  3. block; convolution
  4. none of the above

Correct answer: (C)
block; convolution

658. We can divide today's networks into _________ broad categories.

  1. four
  2. three
  3. five
  4. two

Correct answer: (B)
three

659. We can say that a packet switch has _________ types of components.

  1. two
  2. three
  3. four
  4. none of the above

Correct answer: (C)
four

660. We discussed _________ channelization protocols.

  1. two
  2. three
  3. four
  4. none of the above

Correct answer: (B)
three

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