TRB-CS-VIP ONLINE COACHING CENTER ( Test-2) *Computer Networks*

TRB-CS-VIP ONLINE COACHING CENTER ( Test-1) *Computer Networks*

Quiz

 

1. To connect a computer with a device in the same room, you might be likely to use
   
   1.   a coaxial cable
   2.   a ground station
   3.   a dedicated line
   4.   all of the above
2. 27 . Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?
   
   1.   12
   2.   120
   3.   1200
   4.   12000
3. 28 . Eight stations are competing for the use of a shared channel using the 'Adaptive tree Walk Protocol'. If the stations 7 and 8 are suddenly become ready at once, how many bit slots -
   
   1.   3 slots
   2.   5 slots
   3.   7 slots
   4.   9 slots
4. 29 . What is the port number for NNTP?
   1.   70
   2.   79
   3.   87
   4.   119
5. . Contention is
   1.   a continuous frequency capable of being modulated or impressed with a second signal
   2.   the condition when two or more stations attempt to use the same channel at the same time
   3.   one or more conductors that serve as a common connection for a related group of devices
   4.   a collection of interconnected functional units that provides a data communications service among stations attached to the network
6. Avalanche photodiode receivers can detect hits of transmitted data by receiving
   1.   100 photons
   2.   200 photons
   3.   300 photons
   4.   400 photons
7. Satellite-Switched Time-Division Multiple Access (SS/TDMA) is
   1.   a form of TDMA in which circuit switching is used to dynamically change the channel assignments
   2.   the method of determining which device has access to the transmission medium at any time
   3.   a medium access control technique for multiple access transmission media
   4.   all of the above
8. When you ping the loopback address, a packet is sent where?
   1.   On the network
   2.   Across the wire
   3.   Through the loopback dongle
   4.   Down through the layers of the IP architecture and then up the layers again
9. Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?
   
   1.   FTP
   2.   RPC
   3.   SNMP
   4.   SMTP
10. A front-end processor is
    
    1.   a user computer system
    2.   preliminary processor of batch jobs
    3.   a processor in a large-scale computer that executes operating system instructions
    4.   a minicomputer that relieves main-frame computers at a computer centre of communications control functions
11. Which of the following statements is correct for the use of packet switching?
    1.   the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
    2.   by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved
       C. the subdivision of information into individually addressed packets in
    3.   conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individual link failure
    4.   all of the above
12. In CRC there is no error if the remainder at the receiver is _____.
    1.   zero
    2.   non-zero
    3.   the quotient at the sender
    4.   equal to the remainder at the sender
13. What can greatly reduce TCP/IP configuration problems?
    1.   PDC
    2.   WINS Proxy
    3.   WINS Server
    4.   DHCP Server
14. Carrier is
    1.   a continuous frequency capable of being modulated or impressed with a second signal
    2.   the condition when two or more sections attempt to use the same channel at the same time
    3.   one or more conductors that serve as a common connection for a related group of devices
    4.   a collection of interconnected functional units that provides a data communications service among stations attached to the network
15. . Which of the following device is used to connect two systems, especially if the systems use different protocols?
    1.   hub
    2.   bridge
    3.   gateway
    4.   repeater
16. The synchronous modems are more costly than the asynchronous modems because
    
    1.   they produce large volume of data
    2.   they contain clock recovery circuits
    3.   they operate with a larger bandwidth
    4.   they transmit the data with stop and start bits
17. A distributed network configuration in which all data/information pass through a central computer is
    1.   bus network
    2.   star network
    3.   ring network
    4.   Point-to-point network
18. Which of the following TCP/IP protocol allows an application program on one machine to send a datagram to an application program on another machine?
    1.   X.25
    2.   UDP
    3.   SMTP
    4.   VMTP
19. A remote batch-processing operation in which data is solely input to a central computer would require a:
    
    1.   simplex lines
    2.   telegraph line
    3.   mixedband channel
    4.   all the above
20. A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?
    
    1.   6 Kbps
    2.   12 Kbps
    3.   24 Kbps
    4.   48 Kbps
21. . The slowest transmission speeds are those of
    1.   microwaves
    2.   coaxial cable
    3.   fiber-optic cable
    4.   twisted-pair wire
22. . What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?
    1.   51
    2.   192
    3.   0.0.0.5
    4.   192.168.10
23. If you get both local and remote echoes, every character you type will appear on the screen
    
    1.   once
    2.   twice
    3.   three times
    4.   never
24. ICMP (Internet Control Message Protocol) is
    
    1.   a protocol used to monitor computers
    2.   a protocol that handles error and control messages
    3.   a TCP/IP high level protocol for transferring files from one machine to another
    4.   a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
25. . Which of the following refers to the terms "residual error rate"?
    1.   signal to noise ratio divided by the ratio of energy per bit to noise per hertz
    2.   the number of bit errors per twenty four hours of continuous operation on an asynchronous line
    3.   the probability that one or more errors will be detected when an error detection mechanism is used
    4.   the probability that one or more errors will be undetected when an error detection scheme is used