What is the primary function of a modem?

• A. To enhance web browsing speed
• B. To protect against malware attacks
• C. To convert digital data into electrical signals
• D. To store digital data securely

Answer: (C)

The primary function of a modem is to convert digital data into electrical signals. This process is essential for enabling communication between devices over different types of networks, particularly when connecting to the internet. A modem takes the digital data generated by a computer or other device and encodes it into signals that can be transmitted over communication lines, such as telephone wires or fiber optics. At the receiving end, the modem then decodes these electrical signals back into digital data that the receiving device can understand.

This conversion is crucial for the functioning of both broadband and dial-up internet connections, allowing users to send and receive data successfully. While the other options mention important aspects of online use, such as web browsing speed or data security, they do not reflect the fundamental role of the modem in facilitating data transmission.