What is the function of a modem?

The function of a modem is to convert digital signals to analog for transmission over phone lines and vice versa. This process is essential for enabling communication between digital devices, such as computers, and analog transmission mediums like traditional phone lines or cable systems.

When data is sent from a computer, the modem converts the digital data into analog signals so that it can travel over the phone lines. Upon reaching its destination, another modem converts the analog signals back into digital format, making it comprehensible to the receiving device. This conversion is critical in scenarios where broadband internet or traditional landline connections are used.

Other options describe functions that are not related to the primary role of a modem. For instance, connecting a computer to a printer involves different hardware and protocols, while increasing internet speed depends on factors beyond just the modem, such as the service plan and the type of connection (fiber, DSL, etc.). Storing information temporarily refers to functions carried out by RAM or other forms of storage, which are unrelated to the operation of a modem.