(1) A network device that provides access to the Internet for the home or small office. See
cable/DSL gateway.
(2) A device that converts one protocol or format to another. A network gateway converts packets from one protocol to another. An application gateway converts commands and/or data from one format to another. An email gateway converts messages from one mail format to another. See
IP gateway,
proxy server,
default gateway,
media gateway,
NAS gateway,
messaging gateway,
signaling gateway,
WAP gateway,
softswitch,
EGP,
BGP and
IGP.
(3) A device that acts as a go-between two or more networks that use the same protocols. In this case, the gateway functions as an entry/exit point to the network. Transport protocol conversion may not be required, but some form of processing is typically performed. See
proxy server.
(4) An earth station and computer complex that switches data and voice signals between satellites and terrestrial networks. See
earth station.
(5) An earlier name for router. See
router and
layer 3 switch.
(6) See
Gateway Computer.