What is broadband and baseband transmission?
Broadband is a communication technique in which large amount of data (such as voice and video) is transmitted over long distance. The data is sent by modulating each signal onto different frequency. For this purpose, FDM (Frequency Division Multiplexing) technique is used in which multiple signals can be transmitted at the same time.
Baseband is a communication technique in which digital signals are directly transmitted over, transmission line without changing into analog signals (i.e. without using modulation technique). The digital signals are commonly called baseband signals.