CompTIA Network+ Practice Test

The term "baseband" in networking signifies what characteristic?

1. The use of multiple frequencies

2. The use of a single frequency across the medium

3. Support for both analog and digital signals

4. Enhanced security features

The correct answer is: The use of a single frequency across the medium

The term "baseband" refers specifically to the use of a single frequency across the medium for transmitting signals. In baseband systems, the entire bandwidth of the medium is utilized to send a single signal, typically a digital signal, which allows for efficient communication but limits overall capacity to one channel at a time. This means that when multiple devices are transmitting data, they must take turns using the medium, which is often achieved through various multiplexing techniques. This concept is distinct from "broadband," where multiple signals can be sent simultaneously over different frequencies within the same medium. Therefore, the emphasis on a single frequency in baseband is central to its definition and usage in networking contexts, particularly in local area networks (LANs) where Ethernet is a common example.