, () . .
(repeater) , . .
(hub) - . , . , , . , .
(bridge) - , . . , . . .
(switch) - , .
(media converter) - , . (, ) , .
(router) , . , , , . : ; , . .
. ( ) , , USB .. LAN-.
, ( , Ethernet). . ( ) (dial-out) / (dial-in).
LAN- , , , ( Ethernet). .