Asynchronous and Synchronous Data transmission

The basic difference between asynchronous and synchronous data transmission mood are given below-

1. In Asynchronous transmission, data is transmitted character by character; in synchronous transmission, data is transmitted by a group of character.
2. In Asynchronous transmission, data is transmitted at irregular time intervals; in synchronous data is transmitted at regular time intervals.
3. Asynchronous transmission is connection less; synchronous transmission is connection oriented.
4. In Asynchronous transmission a start bit and a stop bit is added to each data segment; in synchronous transmission system start and stop bit are eliminated. Each block framed by header and trailer information.
5. Asynchronous transmission takes much time then synchronous.