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USB is a short form for (Universal serial bus). USB sockets allow USB devices such as smart phones, printers, cameras, and external hard drives to be connected to each other and helps to transfer digital data from one end to another with the help of an cable. They can also supply electric power across the cable to devices that need it.
HDMI is a short form for “High Definition Multimedia Interface”. It is a connector socket by which a user can build a network with a device and can transmit high quality and high bandwidth streams of audio and video from one end to the second end.
VGA stands for “video graphic array”. VGA socket is usually integrated on the computer, usually found on either a motherboard or a video card on a motherboard which helps to carries visual data from CPU to monitor or desktop.