if your on cex u use ccapi then you find a rtm tool of your choice then ur good to go

yes and the Ethernet is for dex!!

CCAPI is a method where you do not need any ethernet cable, its wireless, its a useful method if you don't have easy access to your router to use CEX you need to download the CCAPI Package 2.50 where you then need to install the .PKG provided onto your jailbroken console, then install the computer program and launch it, when the .PKG is installed run that aswell to allow it to install, you can then setup your console with CCAPI Control console program you installed onto your PC by giving it a name and typing in the IP which can be found in System Settings > Console Information, you can then select CCAPI on any tool in a game and hit connect, your console should appear and then hit attach, some tools may require you to enter the IP manually