A video port connects a monitor to a computer using a cable. Video ports and monitor cables transfer analog signals, digital signals, or both. Computers are digital devices that create digital signals. The digital signals are sent to the graphics card where they are transmitted through a cable to a digital display. Digital signals can also be converted to analog signals by the graphics card and transferred to an analog display. Converting a digital signal to an analog signal usually results in lower image quality. A display and a monitor cable that support digital signals should provide higher image quality than those supporting only analog signals. There are several video ports and connector types:

Display cables transfer video signals from the computer to display devices. There are several display cable types: