Computer Science for IGCSE & O level - Data Transmission (Section 12 - No. 35)

Which of the following is a disadvantage of serial data transmission?

Slower transmission rates over longer distances.

More expensive than parallel data transmission.

Complex circuitry.

Simultaneous sending and receiving of data.

Serial data transmission is slower than parallel for transferring data over long distances. However, it has lower costs due to fewer channels.