1. A jumper is a connecting line that connects the demand points of two devices. For example, the connection cable between the switch and the switch can be called a jumper.
2. The "jumpers" of the internal boards of the computer are small metal rods (jumpers) embedded on the motherboard, sound card, hard disk and other equipment, and are set on these metal rods. Switching from left to right or from right to left is called jumper. There is a cap on the 3 pins, and the cap can only cover 2 pins! This is in layman's terms. Small metal rods (jumper posts) on devices such as sound cards, hard drives, etc., and small clips (jumper clips) on these metal rods.
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