Computer Science MCQs

Computer Science :: Networking MCQs

Important solved MCQs of Computer Science topic NETWORKING.


1. How many digits of the DNIC (Data Network Identification Code) identify the country?
A. first three
B. first four
C. first five
D. first six
E. None of the above


2. A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
A. hot potato routing
B. flooding
C. static routing
D. delta routing
E. None of the above


3. 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
A. 0.003
B. 0.009
C. 0.991
D. 0.999
E. None of the above


4. Frames from one LAN can be transmitted to another LAN via the device
A. Router
B. Bridge
C. Repeater
D. Modem


5. Which of the following condition is used to transmit two packets over a medium at the same time?
A. Contention
B. Collision
C. Synchronous
D. Asynchronous
E. None of the above


6. You have a class A network address 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?


7. What are the most commonly used transmission speeds in BPS used in data communication?
A. 300
B. 1200
C. 2400
D. 9600
E. None of the above


8. What is the default subnet mask for a class C network?
E. None of the above


9. Which of the following is used for modulation and demodulation?
A. modem
B. protocols
C. gateway
D. multiplexer
E. None of the above


10. Which of the following is not a disadvantage of wireless LAN?
A. Slower data transmission
B. higher error rate
C. interference of transmissions from different computers
D. All of the above


11. The Internet Control Message Protocol (ICMP)
A. allows gateways to send error a control messages to other gateways or hosts
B. provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
C. reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem
D. All of the above
E. None of the above


12. Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the most correct answer.
A. Modem
B. Cable
C. Hub
D. Router


13. 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
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


14. How many hosts are attached to each of the local area networks at your site?
A. 128
B. 254
C. 256
D. 64
E. None of the above


15. Which of the following technique is used for fragment?
A. a technique used in best-effort delivery systems to avoid endlessly looping packets
B. a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame
C. one of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
D. All of the above
E. None of the above

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