Data communication is the exchange of data between two nodes via some form of link (transmission medium) such as cable.

Data flow

• it means nodes are going to exchange the data.

• data is going to flow from one node to another node

• there are 3 forms of data flows.

  1. Simplex
  2. Half duplex
  3. Full duplex

  Simplex

  • In simplex data flows, communication is always unidirectional.

  • One device can transmit and other devices will receive the data.

    examples: keyboard, traditional monitors, etc.

    

  Half duplex

  • In a half-duplex, communication is in both directions but not simultaneously.
  • If one device is sending, the other devices can only receive the data at the same time & vice versa. ex: walkies-talkies

Full duplex

• It is also known as a Duplex.

• Communication is in both directions simultaneously.

• Devices can send or receive the data at the same time.

  ex: Phone call i.e we can talk and listen to the voice at the same time.

Thanks for reading.

Read the all Computer Networks resources here coderharsh.in/series/computer-networks