How to tell if you are connected to Wireless B, G or N?

I'm using Windows 8, but I believe the same thing should work for 7. It doesn't exactly tell you the protocol, but it tells you the current network speed.

1. Open Network and Sharing Center
2. Left-click on Wi-Fi connection
3. Watch the "Speed" level for a while

I did it with my own, and it was usually pegged at 54.0 Mbps, indicating that it is working on 802.11g. If you see it get above 54 Mbps, you're using 802.11n, because 54 is as high as g goes.