Computer Network Transmission Mode
Duplex or Transmission Mode:
Transmission Mode or Duplex means transferring of data between two devices. It is also known as Communication Mode.
The Transmission Mode is divided into 3 categories –
• Simplex Mode
• Half-duplex Mode
• Full-duplex Mode
Simplex Mode: –
• It is a Unidirectional Communication; the data transmits in one direction only from one device to another device.
• The sender device that sends data can only but cannot received the data. Other hand the receiver device that receive only the data but cannot send the data.
• Example: – T.V. and Keyboard.
Advantages of Simplex Mode: –
• The main advantages of Simplex mode are that the full capacity of the transmission medium is utilized during the transmission, there are no any traffic issues.
Disadvantages of Simplex Mode:
• There are no possibilities of Bio-directional communication. Here two devices cannot communicate with each other.
• It is a Bio-directional transmission but one at a time.
• When the sender in sending the data receiver can only receive, they cannot send at the same time and vice versa.
• Example: – Walkie-talkie.
Advantages of Half-duplex Mode:
• The main advantages of the Half-duplex mode are that they can utilize the entire bandwidth during the transmission.
Disadvantages of Half-duplex Mode:
• In Half-duplex mode, when one device sending the data, then another device receiving the data, then another device waits, they can be some delay at the time.
Full-duplex Mode: –
• It is a Bio-directional communication.
• Both devices sending and receiving data at the same time.
• Example: – Telephone network.
Advantages of Full-duplex mode: –
• No delay in communications both devices can send and receive data at the same time.
Disadvantages of Full-duplex mode: –
• The full capacity is divided by into both directions.
Comparison of Simple, Half-duplex and Full-duplex mode:
|It is a Unidirectional communication.||It is a Bi-directional communication but one at a time.||It is Bio-directional communication both at a time.|
|The sender can only send the data.||The sender can only send and receive data, but one at a time.||The sender can send and receive data both at a time.|
|It is the worst performing mode in transmission mode.||It is better than Simplex.||It is the best performing mode of transmission mode.|
|Its example of Keyboard & Monitor.||Its an example of a Walkie-talkie.||Its example of Telephone.|
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