Transmission modes

Transmission modes

1. simplex transmission

   • sends data in one direction only.
   • A radio broadcast is a good example of simplex transmission.

2. Half-duplex transmission

   • allows two-way transmissions but the devices don’t transmit at the same time. A system being used to monitor and control manufacturing processes can use half-duplex transmissions. It will send a message to the control computer, which will respond with new settings, but they both cannot send messages at the same time. Some network systems use half-duplex to maximise bandwidth. 3 Full duplex transmission: allows two-way communication at the same time. The telephone system, land or mobile, is an example of a full duplex system

3. type of storage units

   • bit (b)
     • 8 bits = 1 byte
   • byte (B)
     • 1024 bytes = 1 kilobyte
   • kilobyte (KB)
     • 1024 kilobyte = 1 megabyte
   • Megabyte (MB)
   • Gigabyte (GB)
   • Terabyte (TB)