Repeater

The repeater is an old device used to restore signal quality between two points but that is its only function, and because of only being able to restore the quality between two points it only has two ports.

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A repeater in networking is used to boost the strength of a signal so it can be broadcast over a longer distance. An example of a signal repeater can be found in some houses, as many people have wireless network repeaters to boost their WiFi signal when they are further away from their router.

David Macartney - EC1641449