Data Communication and Networking MCQs offer a valuable resource to test and enhance your understanding of the intricate world of data transmission, network protocols, and communication technologies. Whether you’re a student preparing for exams or a professional aiming to strengthen your knowledge, these multiple-choice questions with Answers cover a wide spectrum of topics, including network architecture, protocols, and security. These MCQs will help students in university exams,competitive exams and interviews preparation.

Section-1

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

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1. Modulation is the process of ________

  •  sending a file from one computer to another computer
  • converts digital signals to analog signals
  • converting analog signals to digital signals
  • echoing every character that is received
  • ethernet
  • point to point protocol
  • HDLC
  • all the above

3. Which of the following is used for modulation and demodulation?

  • Modem
  • Protocols
  • Gateway
  • Multiplexer

4. A software that allows a personal computer to pretend it as a terminal is _______

  • auto dialing
  • bulletin board
  • modem
  • terminal emulation
  • logical link control sublayer
  • media access control sublayer
  • network interface control sublayer
  • none of the mentioned

6. Which layer of OSI model is responsible for creating and recognizing frame boundaries?

  • Physical layer
  • Data link layer.
  • Transport layer
  • Network layer

7. If digital data rate of 9600 bps is encoded using 8 – level phase shift keying (PSK) method, the modulation rate is ______

  • 1200 bands
  • 3200 bands
  • 4800 bands
  • 9600 bands

8. Four bits are used for packet sequence numbering in a sliding window protocol. What is the maximum window size?

  • 4
  • 8
  • 15
  • 16

9. Header of a frame generally contains

  • synchronization bytes
  • addresses
  •  frame identifier
  • all the above

10. The ________ model shows how the network functions of a computer ought to be organized.

  • CCITT
  • OSI
  • ISO
  • ANSI

Section-2

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

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1. An endpoint of an inter-process communication flow across a computer network is called

  • socket
  • pipe
  • port
  • none of the mentioned

2. Which of the following is not used in Local Area Networks (LAN)?

  • Computer
  • Printer
  • Modem
  • Cable

3. Communication between computers almost always ________

  • serial
  • series parallel.
  • parallel
  • direct

4. The_____ flag indicates that the entry of the destination column is a host-specific address.

  • gateway
  • host-specific.
  •  modified by redirection.
  • added by redirection

5. The IP address is assigned ________

  • randomly
  • alternatively
  • area wise.
  • hierarchically

6. Most of the internet users are on a class ________ network

  • A
  • B
  • C
  • D

7. Transport layer aggregates data from different applications into a single stream before passing it to

  • network layer
  • data link layer
  • application layer
  • physical layer

8. TCP/IP reserve _______ ports for protocols.

  • 21
  • 24
  • 1024
  • 2042

9. IPV4 uses ______ bit value to represent address.

  • 128
  • 64
  • 32
  • 16

10. The _______ flag indicates that a redirection message has added a new entry to the routing table.

  • gateway
  • host-specific
  • modified by redirection
  • added by redirection.
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