Final answer:
A modem converts signals and facilitates wireless connectivity.
Step-by-step explanation:
A modem is a device that allows computers to connect to the internet. It functions by converting analog signals to digital signals and vice versa. This is important because analog signals are used to transmit data over telephone lines, while digital signals are used by computers to process and transmit data. Therefore, a modem acts as a translator, allowing the two types of signals to communicate with each other.
In addition to converting signals, modems also facilitate wireless connectivity. They enable devices to connect to the internet without the need for physical cables. This is done by utilizing wireless protocols such as Wi-Fi or cellular networks.