• A serial port, also known as a communication port, is used to connect external devices such as a modem, mouse, or keyboard to a computer (basically in older PCs).
• Scanners and printers are often connected via parallel connections.
• In the majority of computer systems, there are at least two USB ports.
• PS/2 ports are special connections for connecting ancient keyboards and mice to computers.
• VGA ports, also known as Video Graphic Array connectors, link the monitor to the video card on a computer.
• Microphones and speakers are connected to the computer's sound card through sockets.
• Apple created the IEEE 1394 interface in the late 1980s and early 1990s as FireWire.
• A port for sending and receiving infrared signals from other devices is known as an IR port.
• Previously, these ports were used to connect a joystick to a computer. However, USB ports have taken their place.
• A Modem port connects a PC's modem to the telephone network, as the name implies.
• The Ethernet port allows you to connect to a network and the Internet at high speeds (provided by LAN or other sources)
• The DVI port is widely utilised by video card makers to link LCD (flat panel) monitors to high-end visual graphic cards in computers.

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