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CS601 Midterm MCQs 2025

Data Communication PDF 9.4 MBUpdated 23 Oct 2026
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Midterm past paper CS601 Midterm MCQs 2025 PDF 9.4 MB
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Midterm past paper
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CS601 Data Communication
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23 Oct 2026
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Q1. A connecting device ____________________ in a network

  1. Provides power supply to network devices.
  2. Controls network traffic and facilitates data transfer between devices.
  3. Determines the type of data transmitted in the network.
  4. Manages network security

Correct answer: Controls network traffic and facilitates data transfer between devices.

Q2. Bandwidth can be measured in _______________.

  1. Decibel
  2. Lambda
  3. Phase
  4. Bps

Correct answer: Bps

Q3. In a complex network communication, we need a protocol at each layer, this process is called ____________.

  1. Protocol Layering
  2. Topology
  3. Encryption
  4. Redundancy

Correct answer: Protocol Layering

Q4. The number of dedicated links required in Mesh topology is calculated by the formula: _________________.

  1. n(n-1)
  2. n
  3. n(n-1)/2
  4. n*2n

Correct answer: n(n-1)/2

Q5. For a noiseless channel, theoretical formula to calculate the data rate was developed by ____________.

  1. Shannon
  2. Rivest
  3. Nyquist
  4. Hamming

Correct answer: Nyquist

Q6. ___________ are known as identical objects in Network layer.

  1. Bits
  2. Frame
  3. Messages
  4. Datagrams

Correct answer: Datagrams

Q7. In Bus topology, the cable used to connect a node with the backbone cable is called ____.

  1. Connector
  2. Drop Line
  3. Central Cable
  4. Main Line

Correct answer: Drop Line

Q8. _______________ is the Nyquist bit rate formula for noiseless channel.

  1. BitRate =2*Bandwidth*log2
  2. BitRate =2*Bandwidth*log2 L
  3. BitRate =3*Bandwidth*log2 L
  4. BitRate =2*Bandwidth* L

Correct answer: BitRate =2*Bandwidth*log2 L

Q1. At the Application layer, object/information is in the form of _______________.

  1. Frame
  2. Segment
  3. Packet
  4. Message

Correct answer: Message

Q2. In ____________signal changes its shape or form.

  1. Attenuation
  2. Distortion
  3. impulse Noise
  4. Thermal noise

Correct answer: Distortion

Q3. Two stations are connected via a secure link in which messages are encrypted from source to the destination. This encrypted message is called ___________ .

  1. Protocol
  2. Plain text
  3. Cipher text
  4. Message

Correct answer: Cipher text

Q4. Identify the correct formula to calculate Propagation time.

  1. Propagation time = Distance / (Propagation Speed)
  2. Propagation time = throughput / (Propagation Speed)
  3. Propagation time = Delay / (Propagation Speed)
  4. Propagation time = Bandwidth / (Propagation Speed)

Correct answer: Propagation time = Distance / (Propagation Speed)

Q5. ____________ is the range of frequencies contained in a composite signal.

  1. Phase
  2. Bandwidth
  3. Noise
  4. Amplitude

Correct answer: Bandwidth

Q6. Low pass channel with ______ bandwidth is not real and is used for theoretical modeling.

  1. Ethernet
  2. Infinite
  3. Narrow
  4. Multiplexed

Correct answer: Infinite

Q7. A frequency is called ------, if the rate of change in sine wave is instantaneous.

  1. Zero frequency
  2. Infinite frequency
  3. Bandwidth
  4. Frequency hertz

Correct answer: Infinite frequency

Q8. Packets travel in _________ layer of TCP/IP Protocol suite.

  1. Presentation
  2. Data link
  3. Network
  4. Application

Correct answer: Network

Q1. _____ is composed of thousands of interconnected networks expanded over large geographical area.

  1. The Internet
  2. Metropolitan Area Network
  3. Home Network
  4. Local Area Network

Correct answer: The Internet

Q2. The bandwidth-delay product defines the number of bits that can fill the_______________.

  1. Hub
  2. Switch
  3. Network
  4. Link

Correct answer: Link

Q3. Identify the correct formula to calculate Propagation time.

  1. Propagation time = Delay / (Propagation Speed)
  2. Propagation time = throughput / (Propagation Speed)
  3. Propagation time = Distance / (Propagation Speed)
  4. Propagation time = Bandwidth / (Propagation Speed)

Correct answer: Propagation time = Distance / (Propagation Speed)

Q4. Digital signals are identified by a _______ set of discrete values.

  1. Logical
  2. Limited
  3. Infinite
  4. Discrete

Correct answer: Limited

Q5. OSI stands for ___________.

  1. Open System Interconnection
  2. Open Standard Interconnection
  3. Open Source Interconnection
  4. Open System Interface

Correct answer: Open System Interconnection

Q6. ___________ are known as identical objects in Network layer.

  1. Datagrams
  2. Bits
  3. Frame
  4. Messages

Correct answer: Datagrams

Q7. Switch is a _____ layer device.

  1. Network
  2. Data link
  3. Transport
  4. Application

Correct answer: Data link

Q8. _______ is the example of multipoint topology.

  1. Hub
  2. Bus
  3. Star
  4. Mesh

Correct answer: Bus

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