Explanation:

- Parallel ports are often used for connecting peripherals like printers.

- These ports transfer multiple bits of data simultaneously through multiple channels.

- Essentially, a traditional parallel port transfers 8 bits of data at once.

- This is akin to 1 byte of data being transmitted in every cycle.

Option 3: 8

- This option accurately represents the data transfer capacity of a typical parallel port.

- Options 1 and 2 imply smaller data size transfers not applicable for typical parallel ports.

- Option 4 represents a larger transfer than standard parallel ports, usually associated with modern interfaces or extended versions.