Difference Between Serial and Parallel Transmission

Sr. No.	Serial Transmission	Parallel Transmission
1	In serial Transmission data is transferred bit by bit.	In parallel Transmission data is transferred in bytes(it may be 4,8bytes)
2	It Uses Single transmission media. E.g. to send 1 byte only 1 data line is used.	It uses multiple transmission media .E.g. to transfer 1 Byte 8 Data lines are required.
3	Data Transfer rate is slow because each bit of data is transmitted serially one after another.	Data Transfer rate is high, since data is transferred in the form of bytes.
4	Used in long distances transmission.	Used in short distances transmission.
5	Less Expensive	More Expensive because more data lines are used.