Data Communication and Networking Gk Questions SET-8 with Answers

We have provide here is the list of Data Communication and networking Mcqs for the preparation competitive exams. Each question has four options followed by the right answer.

MCQ Questions for Data Communication and Networking with Answers

Q1. The physical layer of a network

(i) Constructs packets of data and sends them across the network
(ii) Controls error detection and correction
(iii) Defines the electrical characteristics of signals passed between the computer and communication devices
(iv) None of these

(iii) Defines the electrical characteristics of signals passed between the computer and communication devices

Q2. One unsolved problem with satellite system is….

(i) coverage
(ii) privacy
(iii) bandwidth
(iv) access

(ii) privacy

Q3. Which of the following can be determined from a frequency-domain graph of a signal?

(i) Phase
(ii) Bandwidth
(iii) Power
(iv) All the above

(ii) Bandwidth

Q4. Devices interconnected by the LAN should include

(i) Computers and terminals
(ii) mass storage device, printers and plotters
(iii) bridges and gateways
(iv) All of the above

(iv) All of the above

Q5. Network components are connected to the same cable in the _ topology.

(i) Mesh
(ii) Bus
(iii) Star
(iv) Ring

(ii) Bus

Q6. 100 Over a period of 30 years, a kilometer of fiber optic cable is likely to be broken.

(i) not at all
(ii) once
(iii) 10 times
(iv) 2 or 3 times

(iv) 2 or 3 times

Q7. Wavelength is proportional to propagation speed and proportional to period.

(i) Directly; directly
(ii) Inversely; directly
(iii) Directly; inversely
(iv) Inversely; inversely

(i) Directly; directly

Q8. Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

(i) 0.0.0.0, 0.0.0.1, 0.0.1.1
(ii) 255.255.255.0, 255.255.0.0, 255.0.0.0
(iii) 255.0.0.0, 255.255.0.0, 255.255.255.0
(iv) 255.255.0.0, 255.255.255.0, 255.255.255.255

(ii) 255.255.255.0, 255.255.0.0, 255.0.0.0

Q9. A device that connects to a network with our the use of cables is said to be

(i) Open source
(ii) Cabled
(iii) Distributed
(iv) Wireless

(iv) Wireless

Q10. How does packet Burst affect network performance?

(i) It helps in secure communication
(ii) It helps in error control
(iii) It increases network bandwidth
(iv) It increases speed at which packets are distributed

(iii) It increases network bandwidth

Q11. A voice/data multiplexer will not flow control….

(i) voice
(ii) data
(iii) time slots
(iv) odd channels

(i) voice

Q12. When propagation speed is multiplied by propagation time, we get the __.

(i) Throughput
(ii) Wavelength of the signal
(iii) Distance a signal or bit has traveled
(iv) Distortion factor

(iii) Distance a signal or bit has traveled

Q13. HOSTS file entries are limited to how many characters?

(i) 8
(ii) 255
(iii) 500
(iv) Unlimited

(ii) 255

Q14. Which of the following items is not used in Local Area Networks(LANs)?

(i) Computer Modem
(ii) Cable
(iii) Modem
(iv) Interface card

(iii) Modem

Q15. Higher the rate an analog signal is sampled

(i) smaller the difference between sampled amplitudes
(ii) larger the difference between sampled amplitudes
(iii) greater the noise level
(iv) more bits required to represent the sample

(i) smaller the difference between sampled amplitudes

Q16. What is the bandwidth of a signal that ranges from 40 KHz to 4 MHz?

(i) 3.96 MHz
(ii) 36 MHz
(iii) 360 KHz
(iv) 396 KHz

(i) 3.96 MHz

Q17. A central computer surrounded by one or more satellite computers is called a

(i) bus network
(ii) ring network
(iii) star network
(iv) All of the above

(iii) star network

Q18. Fibre optics have maximum segment

(i) 100m
(ii) 200m
(iii) 500m
(iv) 2000m

(iv) 2000m

Q19. They key to the operation of ADPCM is….

(i) fast sampling
(ii) high amplitude
(iii) adaptive predictor
(iv) digitization

(iii) adaptive predictor

Q20. In a time-domain plot, the vertical axis is a measure of __.

(i) Frequency
(ii) Phase
(iii) Amplitude
(iv) Time

(iii) Amplitude

Q21. FDDI is a

(i) ring network
(ii) star network
(iii) mesh network
(iv) bus based network

(i) ring network

Q22. International bipolar violations……

(i) represent coding errors caused by line impairments
(ii) are used to convey information or maintain a minimum number of ones on a digital line
(iii) result in successive marks having opposite polarities
(iv) occur only in the laboratory

(ii) are used to convey information or maintain a minimum number of ones on a digital line

Q23. A periodic signal completes one cycle in 0.001 s. What is the frequency?

(i) 1 Hz
(ii) 100 Hz
(iii) 1 KHz
(iv) 1 MHz

(i) 1 Hz

Q24. The residual error rate is the

(i) Probability that one or more errors will be detected when an error detection mechanism is used
(ii) Signal to noise ratio divided by the ratio of energy per bit to noise per hertz
(iii) Number of bit errors per twenty four hours of continuous operation on an asynchronous line
(iv) Probability that one or more errors will be undetected when an error detection scheme is used

(iv) Probability that one or more errors will be undetected when an error detection scheme is used

Q25. A machine that connects two or more electronic mail systems and transfer mail messages among

(i) Bridges
(ii) User agent
(iii) Gateways
(iv) Mail gateway

(iv) Mail gateway

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