Data Communication Mode

Simplex

• Transmission possible in two directions simultaneously

• Transmission possible in one direction only

• Transmission in two directions, but not at the same time

Duplex

• Transmission possible in one direction only

• Transmission possible in two directions simultaneously

• Data is sent one bit at a time over a single wire or channel

Half Duplex

• Transmission in two directions, but not at the same time

• Transmission possible in one direction only

• Transmission possible in two directions simultaneously

Television Broadcast

• Simplex
  

• Half-Duplex
  

• Full-Duplex

• None of these

Walkie-Talkie

• Simplex

• Half Duplex

• Full Duplex

• None of these