(1) A router within the Internet that forwards IP packets from one network to another. Same as "IP router." See core router and edge router.

(2) A router that is used to forward traffic to and from the Internet.

(3) (InterNet Router) Macintosh software from Apple that internetworks different access methods (LocalTalk, EtherTalk, TokenTalk, etc.) and can reside in any network station. Each Router can connect up to eight networks with a maximum of 1,024 networks and 16 million nodes.