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RADIUS
(Remote Authentication Dial-In User Service) - RADIUS is a client/server protocol and software that enables remote access servers (RASs), to communicate with a central server to authenticate dial-in users and authorise their access to the network.

Resource
A particular object of information provided on the Internet. Can be anything from a picture through to a video or application.

Router
A special-purpose hardware device, or PC, that handles the connection between 2 or more networks. Routers concentrate on looking at the destination addresses of the packets passing through them and deciding which route to send them on.

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