Final answer:
You would use an RJ-11 connector to connect your computer to the internet with a dial-up connection.
Step-by-step explanation:
RJ-11 connectors are commonly used to connect devices to telephone lines. In the given situation, you would use an RJ-11 connector to connect your computer to the internet with a dial-up connection. The RJ-11 connector connects to the modem in your computer, allowing you to establish a connection by dialing a phone number. This type of connector is specifically designed for telephone lines and is not suitable for other types of connections.