Computer Networking MCQs

Our Computer Networks questions and answers focus on all areas of Computer Networks subject covering 100+ topics in Computer Networks. These topics are chosen from a collection of the most authoritative and best reference books on Computer Networks. One should spend 1 hour daily for 2-3 months to learn and assimilate Computer Networks comprehensively.

Q: Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error??

A. one bit or any odd number of bits inverted in a block of data during transmission
B. two bits or any even number of bits inverted in a block during transmission
C. one bit or any odd number of bits inverted in a byte during transmission
D. two bits or any even number of bits inverted in a byte during transmission


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Q: IEEE project 802 divides the data link layer into an upper _____ sublayer and a lower _____ sublayer.?

A. HDLC, PDU
B. PDU, HDLC
C. MAC, LLC
D. LLC, MAC


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Q: A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate instruction to the modem for this purpose??

A. Communications software
B. Error detecting protocols
C. Link access procedure (LAP)
D. Telecommunications


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Q: With an IP address of 201.142.23.12, what is your default subnet mask??

A. 0.0.0.0
B. 255.0.0.0
C. 255.255.0.0
D. 255.255.255.0


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Q: The frequency range : 300 kHz to 3 MHz is used for?

A. AM radio transmission
B. FM radio transmission
C. TV transmission
D. microwave communications, satellite and radar


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Q: Propagation delay depends on?

A. Packet length
B. Transmission rate
C. Distance between the routers
D. None of the mentioned


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Q: Transmission delay does not depend on?

A. Packet length
B. Distance between the routers
C. Transmission rate
D. None of the mentioned


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Q: In a network If P is the only packet being transmitted and there was no earlier transmission which of the following delays could be zero?

A. Propogation delay
B. Queuing delay
C. Transmission delay
D. Processing delay


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Q: The total nodal delay is given by?

A. dnodal = dproc – dqueue + dtrans + dprop
B. dnodal = dproc + dtrans – dqueue
C. dnodal = dproc + dqueue + dtrans + dprop
D. dnodal = dproc + dqueue – dtrans – dprop


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Q: If end to end delay is given by dend-end = N(dproc + dtrans + dprop) is a non congested network. The number of routers between source and destination is?

A. N/2
B. N
C. N-1
D. 2N


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