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. FDDI used which type of physical topology?
(i) Tree
(ii) Bus
(iii) Ring
(iv) Star
(iii) Ring
Q2. A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?
(i) 3 Kbps
(ii) 6 Kbps
(iii) 12 Kbps
(iv) 24 Kbps.
(ii) 6 Kbps
Q3. The Ring Topology, the computer in possession of the …………….. can transmit data.
(i) packet
(ii) data
(iii) access method
(iv) token
(iv) token
Q4. The cheapest modems can transmit…..
(i) 300 bits per second
(ii) 1200 bits per second
(iii) 2400 bits per second
(iv) none of these
(i) 300 bits per second
Q5. Which type of network would use phone lines?
(i) Wireless
(ii) WAN
(iii) LAN
(iv) WWAN
(ii) WAN
Q6. The Nyquist theorem specifies the minimum sampling rate to be_______.
(i) Twice the bandwidth of a signal
(ii) Twice the highest frequency of a signal
(iii) Equal to the lowest frequency of a signal
(iv) Equal to the highest frequency of a signal
(ii) Twice the highest frequency of a signal
Q7. The loss in signal power as light travels down the fiber is called _ .
(i) Scattering
(ii) Attenuation
(iii) Propagation
(iv) Interruption
(ii) Attenuation
Q8. What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?
(i) 192
(ii) 192.168.10
(iii) 0.0.0.5
(iv) 51
(ii) 192.168.10
Q9. How many bits are there in the Ethernet address?
(i) 16 bits
(ii) 32 bits
(iii) 48 bits
(iv) 64 bits
(iii) 48 bits
Q10. 136 Local area network can transmit….
(i) faster than telecommunications over public telephone lines.
(ii) slower than telecommunications over public telephone lines.
(iii) using twisted-pair wiring or coaxial cables
(iv) both (i) and (iii)
(iv) both (i) and (iii)
Q11. In _ transmission, a start bit and a stop bit frame a character byte.
(i) Synchronous serial
(ii) Asynchronous serial
(iii) Parallel
(iv) (i) and (ii)
(ii) Asynchronous serial
Q12. What is the commonly used unit for measuring the speed of data transmission?
(i) Bytes per second
(ii) Bits per second
(iii) Baud
(iv) Both (ii) and (iii)
(iii) Baud
Q13. ICMP (Internet Control Message Protocol) is
(i) a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
(ii) a TCP/IP high level protocol for transferring files from one machine to another
(iii) a protocol used to monitor computers
(iv) a protocol that handles error and control messages
(iv) a protocol that handles error and control messages
Q14. Why the Caps lock is key referred to as a toggle key?
(i) Because the function goes back and forth every time it is pressed
(ii) Because it cannot be used to insert
(iii) Because it cannot be used to delete
(iv) Because it cannot be used for entering numbers
(i) Because the function goes back and forth every time it is pressed
Q15. WI–FI uses
(i) Phase line
(ii) Radio waves
(iii) Optic fiber
(iv) Sound waves
(ii) Radio waves
Q16. A network that requires human intervention to route signals is called.
(i) bus network
(ii) ring network
(iii) star network
(iv) T-switched network
(iv) T-switched network
Q17. Which quantization level results in a more faithful reproduction of the signal?
(i) 2
(ii) 8
(iii) 16
(iv) 32
(iv) 32
Q18. The layer one of the OSI model is __ .
(i) Link layer
(ii) Physical layer
(iii) Broadcast layer
(iv) Router layer
(ii) Physical layer
Q19. 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?
(i) UDP
(ii) VMTP
(iii) X.25
(iv) SMTP
(i) UDP
Q20. A half-duplex communication channel permits information to travel
(i) At timed intervals
(ii) One direction only
(iii) Both ways, but not at once
(iv) Both ways at once
(iii) Both ways, but not at once
Q21. Which of the following represents the fastest data transmission speed?
(i) Gbps
(ii) Kbps
(iii) Bps
(iv) Bandwidth
(i) Gbps
Q22. A central computer surrounded by one or more satellite computers is called.
(i) bus network
(ii) ring network
(iii) star network
(iv) none of these
(iii) star network
Q23. If the maximum value of a PCM signal is 31 and the minimum value is -31, how many bits were used for coding?
(i) 4
(ii) 5
(iii) 6
(iv) 7
(iii) 6
Q24. During networking, process of the CPU asking each terminal whether it wants to send a message is called
(i) Polling
(ii) Communicating
(iii) Sharing
(iv) Queuing
(i) Polling
Q25. Networks are monitored by security personnel and supervised by _ who set(s) up accounts and passwords for authorized network users.
(i) Password administrators
(ii) Network administrators
(iii) The government
(iv) IT managers
(ii) Network administrators
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