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Computer Sciences Practice MCQ Page 22

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Computer Sciences Practice MCQ Page 22 Empty Computer Sciences Practice MCQ Page 22

Post by Admin Tue Jan 05, 2016 11:25 pm

Question: 302   How many OSI layers are covered in the X.25 standard?

  1. two
  2. three
  3. seven
  4. six
  5. non of the above

Question: 303   Layer one of the OSI model is

  1. physical layer
  2. link layer
  3. transport layer
  4. network layer
  5. non of the above

Question: 304   The X.25 standard specific a

  1. technique for start-stop data
  2. technique for dial access
  3. DTE/DCE interface
  4. data bite rate
  5. non of the above

Question: 305   Which of the following communication modes support two -way traffic but in only one direction at a time?

  1. simplex
  2. half-duplex
  3. three-quarters duplex
  4. full of the above
  5. non of the above

Question: 306   Which of the following might be used by a company to satisfy its growing communications needs?

  1. front-end processors
  2. multiplexer
  3. controller
  4. concentrator
  5. all the above

Question: 307   What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

  1. 4
  2. 2
  3. 6
  4. 3
  5. non of the above

Question: 308   The interactive transmission of data within a time sharing system may be best suited to

  1. simplex lines
  2. half-duplex lines
  3. full-duplex line
  4. biflex-line
  5. non of the above

Question: 309   Which l of the following statement is incorrect?

  1. The different between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission
  2. Half-duplex line is a communication line in which data can move in two directions,but not at the same time.
  3. Teleprocessing combines telecommunications and DP techniques in online activities
  4. Batch processing is the preferred processing mode for telecommunication operations
  5. None of the above

Question: 310   which of the following is considered a board band communication channel?

  1. coaxial code
  2. fiber optic cable
  3. microwave circuits
  4. satellites systems
  5. all the above

Question: 311   Which of the following is not a transmission medium?

  1. telephone lines
  2. coaxial cable
  3. modem
  4. microwave systems
  5. satellite systems

Question: 312   Which of the following does not allow multiple uses or devices to share one communication line?

  1. doubleplexer
  2. multiplexer
  3. concentrator
  4. controller
  5. none of the above

Question: 313   Which of the following signals is not standard RS-232-C signal?

  1. VDR
  2. RTS
  3. CTS
  4. DSR
  5. None of the above
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