Those are all the normal icons/details for your broadband connection. LAN would come into use if you were to set-up a small home network - i.e. connecting a laptop and printer wirelessly. You do not need to do anything, just leave them as they are.
WPA2 hack: How secure is your Wi-Fi?
Add Depth Of Field to a photo using Tilt Shift Blur in Photoshop
iPhone tips & tricks
Comment afficher des fichiers cachés sur Mac ?