Federal Board | Past Papers | Notes | A-Level

Back to: Computer Science Class-11 Notes

Narrow Band
Narrow Band or low speed has a transmission rate from 40 to 300 bps or baud. In this category, telegraph communication lines are included. These channels are mostly used for low speed teletypewriter communication and for other low speed devices.

Broad Band
Broad Band are the high speed communication channels. They are also known as wideband. They can transmit data at the rate of 56,000 bps or baud. Broadband is used when a large amount of data is to be transmitted at high speed.