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Monday Quiz: Data Communications

01 Jun 2015  | Martin Rowe

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Data communications is more than just getting bits reliably from one end of a transmission medium to another. Bits need to be organised so that data arrives intact at its assigned destination. That's where protocols come in. The not only group data into frames or packets, but they include information about the sender, receiver, and codes used for checking errors. Of course, it all starts with that for if there are too many errors in a transmission, then a receiver won't be able to reassemble the data (payload) into useful form.

Today's networks are organised around the seven-layer OSI model, which provides a framework for organising data communications. This week's questions are based on that model.

1. Which OSI layer controls error control?

  1. Network layer
  2. Physical layer
  3. Data-link layer
  4. Transport layer

Data communications

2. Which layer handles end-to-end message transfer?

  1. Network layer
  2. Physical layer
  3. Link layer
  4. Transport layer
  5. None of the above

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