Which statement is true about parallel transmission?

Parallel transmission involves sending multiple bits of data simultaneously over multiple channels. This approach is advantageous for data transfer speed, especially over short distances, because more bits can be sent at the same time compared to serial transmission, which sends bits one after the other through a single channel.

In particular, parallel transmission is often used within computer systems for components that are in close proximity, such as connecting a CPU to memory or an internal bus. The speed benefits are notable because, in these scenarios, the synchronization of the multiple data lines is achievable, leading to faster overall data rates.

Understanding the limitations of parallel transmission in longer distances helps clarify why it's not the dominant transmission method; it suffers from issues like signal degradation and timing skew when used over extended lengths, which can disrupt the integrity of the transmitted data. Thus, while parallel transmission is indeed faster for short distances, it is not practically feasible over long distances without additional complications.