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Some documentation I read refers to the pin cover as a “jumper.” Other documentation I read refers to the pins themselves a a “jumper.”
For example, in the A+ Guide to Hardware by Jean Andrews it says:
A jumper is two small posts or metal pins that stick up on the motherboard, used to hold configuration information. An open jumper has no cover, and a closed jumper has a cover on the two pins.
However, on Wikipedia it says:
Jumper pins (points to be connected by the jumper) are arranged in groups called jumper blocks, each group having at least one pair of contact points. An appropriately sized conductive sleeve called a jumper, or more technically, a shunt jumper, is slipped over the pins to complete the circuit...When a jumper is placed over two or more jumper pins, an electrical connection is made between them.
So, in the first case it is the pins that are the jumper, but in the second case it is the cover that is the jumper. There seem to be many more cases which refer to the cover as the jumper, but there are a handful (such as the textbook above) which refer to the pins themselves as jumpers.
Which one of these is correct or are they both correct?
2read it again. they both say the same thing. – Keltari – 2018-10-01T04:56:14.083
6@Keltari: I've read it several times and no they don't? – user1686 – 2018-10-01T04:56:40.973
@grawity actually they do. Both call the pins jumpers. the second calls the sleeve a shunt jumper. – Keltari – 2018-10-01T04:57:51.223
5@Keltari: The latter calls the pins "jumper pins", not "jumpers", which is quite different already. – user1686 – 2018-10-01T05:04:41.077
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Your assumption that a "cover" is a "plastic cover" is incorrect. A shunt jumper (aka shorting block or header shunt) has metal inside it to short the two pins together. IMO the first quote is a dumbed-down explanation that is PC-centric and is otherwise vague. The pins are more often called header pins, at least that's the name I'd use to look them up in a parts catalog.
– sawdust – 2018-10-01T05:14:18.213This question would better fit to [electronics.se] IMHO. – Melebius – 2018-10-01T10:30:03.303
Possible duplicate of What do you call the place on a hard drive (or motherboard, or anywhere else) to place jumpers?
– Melebius – 2018-10-01T10:31:34.957