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 (C)</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 (C)</p> Signup and view all the answers

What represents an agreement between communicating devices?

<p>Protocol (B)</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 (C)</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 (B)</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 (D)</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 (C)</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 (A)</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 (C)</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 (C)</p> Signup and view all the answers

What is essential for enabling data communication between computers?

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

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