. INTERNET . | . [Alice gate] . <PORTE LAN> IP:192.168.0.X . | | . | | . | +---------------+ . | | . | <PORTA WAN> . | [Usrobotics USR5461] . | <PORTE LAN> . | | | . | | | . PC1 PC2 PC3 . IP:192.168.0.X IP:192.168.1.X