Tuesday, September 12, 2017

Computer Science Mock Test UGC-NET (Paper ii & iii- Computer Networks) - Part 19

This Quiz is posted with the sole aim of guiding the aspirants of UGC-NET / CSIR -NET Exam to the path of success. To sharpen the edges of your own intelligence and practice, in a structured and concrete manner to ensure you definite Success in your endeavor and will Pave your way for a successful career in Teaching (or) Research Profession . All the very best...... Knock the door of success......
  1.  The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to __________.
    1.  0.024
    2.  0.009
    3.  0.004
    4.  0.999

  2. State whether the following is True or False.

    i) In bus topology, heavy Network traffic slows down the bus speed.

    ii) It is multi-point configuration.
    1.  False, False
    2.  True, False
    3.  False, True
    4.  True, True 

  3. Error detection at the data link layer is achieved by ______.
    1.  Cyclic redundancy codes
    2.  Equalization
    3.  Hamming codes
    4.  Bit stuffing

  4. The___________layer of OSI model can use the trailer of the frame for error detection.
    1.  Transport layer 
    2.  Presentation layer
    3.  Physical layer 
    4.  Data link layer

  5. In which OSI layers does the FDDI protocol operate?
    1.  Data link layer 
    2.  Physical layer
    3.  Network layer 
    4.  A and B

  6. Match the following IEEE No to their corresponding Name for IEEE 802 standards for LANs.
    i) 802.3                   a) WiFi
    ii) 802.11                b) WiMa
    iii) 802.15.1            c) Ethernet
    iv) 802.16               d) Bluetooth
    1.  i-c, ii-d, iii-a, iv-b
    2.  i-c, ii-a, iii-d, iv-b
    3.  i-b, ii-d, iii-c, iv-a
    4.  i-b, ii-c, iii-d, iv-a

  7. You want to totally reinitialize the router and replace the current running-config with the current startup-config. What command will you use?
    1.  copy run start
    2.  replace run start
    3.  reload
    4.  copy start run

  8. Which data communication method is used to transmit the data over a serial communication link?
    1.  Simplex
    2.  Full duplex
    3.  Half-duplex
    4.  Both a & b

  9. A network that needs human beings to manually route signals is  called ______________.
    1.  Ring network
    2.  Fiber Optic Network 
    3.  T-switched network 
    4.  Bus Network 

  10. Which is not the Regional Internet Registers (RIR) of the following?
    1.  Asia Pacific Network Information Centre (APNIC)
    2.  Reseaux IP Europeans (RIPE)
    3.  Europeans Registry for Internet Numbers (ERIN)
    4.  American Registry for Internet Numbers (ARIN)