Answer Posted / sailendra

Synchronous Communication:

It is based on synchronization between the sender and the
receiver. Both must be synchronized before actual
communication takes place. The clock pulses are generally
used to provide synchronization.

Asynchronous Communication:

This communication doesn't need any synchronization between
the sender and the receiver. Sender may send the
information at anytime without waiting for the receiver to
be ready to receive the information. The the receiver may
receive it some other time later.

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