How do you get online for your PS3 with an Ethernet cable?

All the ads showing features for the PS3 state Online connectivity requires broadband internet service and network devices such as a DSL or cable modem. Most people who have this also require a router and an ethernet cable to allow connection of more than one device to there internet service. The router plugs into the cable modem and your PC and PS3 plug into the router with ethernet cables. Once the PS3 is connected with an ethernet cable then you go to the PS3 main menu settings and then the Network setting then network connections.