Introduction to Data Communication & Networking
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Questions and Answers

What is data communication?

  • Sending pictures and videos over the internet
  • Sending data from one computer to another (correct)
  • Exchange of information between two humans
  • Using radio waves to communicate

    • Which of the following is considered as a transmission medium?

  • Video camera
  • Television
  • Telephone handset
  • Coaxial cable (correct)

    • What is a protocol in data communications?

  • The physical path by which a message travels
  • An agreement between communicating devices (correct)
  • A device that sends the data message
  • The information (data) to be communicated

    • What does the sender do in data communication?

    <p>Sends the data message</p> Signup and view all the answers

    What is the main purpose of a transmission medium?

    <p>To define the physical path for message travel</p> Signup and view all the answers

    What represents an agreement between communicating devices?

    <p>Protocol</p> Signup and view all the answers

    What is the main function of a multiplexer in data communication?

    <p>Combine input signals, allow data compression, and share a single transmission channel</p> Signup and view all the answers

    Why is a demultiplexer used in conjunction with a multiplexer in communication systems?

    <p>To accept only one input and give many outputs, functioning in reverse to a multiplexer</p> Signup and view all the answers

    Which aspect of data communication system ensures that the data must travel from the sender to the receiver in a finite amount of time?

    <p>Timely delivery</p> Signup and view all the answers

    What does the term 'protocol' define in data communication systems?

    <p>Set of rules and conventions agreed upon by the sender and receiver</p> Signup and view all the answers

    What is the main function of a modem in data communication?

    <p>Connect to every computer involved in data communication</p> Signup and view all the answers

    What is the primary means of transferring data from sender to receiver in data communication?

    <p>Transmission medium or wire</p> Signup and view all the answers

    What does the term 'transmission medium' refer to in data communication?

    <p>Physical path over which data travels from the sender to the receiver</p> Signup and view all the answers

    What is essential for enabling data communication between computers?

    <p>A combination of hardware and software</p> Signup and view all the answers

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