What is a modem's primary function in a network?

The primary function of a modem in a network is to convert signals between digital and analog forms. When data is transmitted over telephone lines, cable systems, or other types of networks, it often needs to change format depending on the medium. For example, a modem takes the digital signals from a computer and converts them into analog signals that can travel over traditional telephone lines or coaxial cables. Similarly, when data is received, the modem converts the analog signals back into digital format for the computer to process. This pivotal role of converting and transmitting data makes a modem integral to establishing Internet connectivity for devices within a network.

Other choices, like the role of an Internet service provider or providing Wi-Fi coverage, involve functions beyond the modem’s primary purpose. Similarly, monitoring network traffic is typically handled by routers or specialized network management tools, rather than the modem itself.