I have an older Laptop that is great for taking with me from time to time to do Firmware updates on equipment for work very occasionally. However, it has an older WiFi standard, off the top of my head I beleive it it G. And residental customers have newer routers with the newer standards that I cannot connect to, my laptop does not see those networks. Can I purchase a WiFi USB adapter that I could use to connect to the newer standards N or AC (I think that is what I need, correct me if I'm wrong)? I'm sure the USB ports are older standard too if that matters. Thanks!