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Originally, a hub is the name for the part in the center of a wheel, where the other parts (called spokes) connect. The meaning of the word is always related to being a central piece, which allows connections to other pieces.
- An Ethernet hub connects all the cables in a Local Area Network
- Serial ATA has a component called Port multiplier
- An USB hub allows to connect many devices to a single USB port
- A Transport hub or transport interchange is a station which allows to swich between different lines in the transport network.
- In video games, a hub is a special Level which connects to many other levels.