Synchronous Data Transmission:-
- Data is transmitted synchronously in the form of blocks or frames.
- Full-duplex communication is being used here. Synchronization between the transmitter and recipient is necessary.
- In synchronous transmission, there is no pause between each piece of information.
- When transferring a lot of data, synchronous transmission is more dependable and efficient.
Example:
- Chat Rooms
- Telephonic Conversations
- Video Conferencing
Asynchronous Data Transmission:-
- Data is transmitted asynchronously in the form of bytes or characters. Half-duplex transmission is the type used in this.
- Start bits and stop bits are combined with the data in this transmission. It doesn't need to be synchronized.
Example:
- Forums
- Letters
Let's see the distinction between synchronous and asynchronous transmission now:
| S. No. | Synchronous Transmission | Asynchronous Transmission |
|---|---|---|
| 1. | In Synchronous transmission, data is sent in form of blocks or frames. | In Asynchronous transmission, data is sent in form of bytes or characters. |
| 2. | Synchronous transmission is fast. | Asynchronous transmission is slow. |
| 3. | Synchronous transmission is costly. | Asynchronous transmission is economical. |
| 4. | In Synchronous transmission, the time interval of transmission is constant. | In Asynchronous transmission, the time interval of transmission is not constant, it is random. |
| 5. | In this transmission, users have to wait till the transmission is complete before getting a response back from the server. | Here, users do not have to wait for the completion of transmission in order to get a response from the server. |
| 6. | In Synchronous transmission, there is no gap present between data. | In Asynchronous transmission, there is a gap present between data. |
| 7. | Efficient use of transmission lines is done in synchronous transmission. | While in Asynchronous transmission, the transmission line remains empty during a gap in character transmission. |
| 8. | The start and stop bits are not used in transmitting data. | The start and stop bits are used in transmitting data that imposes extra overhead. |
| 9. | Synchronous transmission needs precisely synchronized clocks for the information of new bytes. | Asynchronous transmission does not need synchronized clocks as parity bit is used in this transmission for information of new bytes. |
| 10. | Errors are detected and corrected in real time. | Errors are detected and corrected when the data is received. |
| 11. | Low latency due to real-time communication. | High latency due to processing time and waiting for data to become available. |
| 12. | Examples: Telephonic conversations, Video conferencing, Online gaming. | Examples: Email, File transfer,Online forms. |
