Hi, I really know almost nothing about networking but I currently moved and am looking for help. The only ISP's around me are Verizon DSL (max at 5mbps) or Service Electric (30mbps). I'm choosing service electric with a technician coming out to install soon, but in the TOU it says a limit to FIVE devices per household. I'm seen people talking about Double NAT and other workaround, can someone explain these? I need an in depth explanation or what to buy. ALSO I want my NAT to still work OPEN for Xbox Live. I game and stream movies ALOT.