Which of the following devices would typically connect through a serial port?

The correct response is that a printer typically connects through a serial port. Historically, serial ports were commonly used for devices requiring a simple, point-to-point connection for data transfer, including printers.

Printers often utilized serial ports, especially older models, to receive data from a computer. Serial ports transmit data one bit at a time, which can be ideal for certain types of printers and other devices that do not require the high-speed data rates that parallel connections or USB interfaces offer.

While keyboards and mice have also been connected via serial ports in the past, they have largely transitioned to using USB or other modern interfaces, enhancing performance and compatibility with newer systems. Therefore, while all three device types could have a history of using serial connections, the printer is the primary device still associated with this type of port in typical contexts.