Computer connections refer to the various ways in which computers can be connected to each other or to other devices. The three most common types of computer connections are modems, links, and ports. Modems are devices that allow computers to connect to the internet or to other computers over a telephone line. Links are connections between two computers or networks that allow them to communicate with each other. Ports are physical connections on a computer that allow it to connect to other devices such as printers or scanners.