Final answer:
An RJ-11 connector is most commonly used with landline telephones to connect them to the telephone network, and is not used for monitors, printers, or televisions.
Step-by-step explanation:
The device most likely to use a cable featuring a registered jack-11 (RJ-11) connector is a landline telephone. The RJ-11 connector is a standard telephone interface that is commonly used in North America to connect telephones to the local telephone network. It is a small, rectangular connector that typically supports up to six conductors, but for most telephone line applications, only two or four are used.
Computer monitors, printers, and televisions do not use RJ-11 connectors for their primary functions. Monitors typically use connectors like HDMI, DisplayPort, or VGA; printers often utilize USB or Ethernet cables; and televisions commonly have HDMI, component, or RF connections.
Therefore, when you see an RJ-11 connector, it is safe to associate it with landline telephones which require this type of connector to plug the telephone into a wall jack to access the telephone network.