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  • Question
  • Which of the following does not allow multiple users or devices to share one communications line?


  • Options
  • A. doubleplexer
  • B. multipplexer
  • C. concentrator
  • D. controller
  • E. None of the above

  • Correct Answer
  • doubleplexer 


  • Networking problems


    Search Results


    • 1. The _____ houses the switches in token ring.

    • Options
    • A. transceiver
    • B. nine-pin connector
    • C. MAU
    • D. NIC
    • E. None of the above
    • Discuss
    • 2. You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?

    • Options
    • A. 255.240.0.0
    • B. 255.248.0.0
    • C. 255.252.0.0
    • D. 255.254.0.0
    • E. 255.255.255.255
    • Discuss
    • 3. A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?

    • Options
    • A. hot potato routing
    • B. flooding
    • C. static routing
    • D. delta routing
    • E. None of the above
    • Discuss
    • 4. What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

    • Options
    • A. Switch
    • B. Bridge
    • C. Gateway
    • D. Router
    • Discuss
    • 5. Which of the following is required to communicate between two computers?

    • Options
    • A. communications software
    • B. protocol
    • C. communications hardware
    • D. access to transmission medium
    • E. All of the above
    • Discuss
    • 6. To connect a computer with a device in the same room, you might be likely to use

    • Options
    • A. a coaxial cable
    • B. a dedicated line
    • C. a ground station
    • D. All of the above
    • E. None of the above
    • Discuss
    • 7. Which of the following statements is correct for the use of packet switching?

    • Options
    • A. the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individual link failure
    • B. the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
    • C. by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
    • D. All of the above
    • E. None of the above
    • Discuss
    • 8. The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

    • Options
    • A. cannot talk at once
    • B. can receive and send data simultaneously
    • C. can send or receive data one at a time
    • D. can do one way data transmission only
    • E. None of the above
    • Discuss
    • 9. How many hosts are attached to each of the local area networks at your site?

    • Options
    • A. 128
    • B. 254
    • C. 256
    • D. 64
    • E. None of the above
    • Discuss
    • 10. The geostationary satellite used for communication systems

    • Options
    • A. rotates with the earth
    • B. remains stationary relative to the earth
    • C. is positioned over equator
    • D. All of the above
    • E. None of the above
    • Discuss


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