Theoretically, 802.11n can reach speeds of 600 Mbps, and even that assumes you're using wireless n's maximum four spatial streams. For now, the Wi-Fi alliance will be testing products with three streams, putting the maximum at 450 Mbps. By comparison, the old 802.11b/g standard reached 64 Mbps, and the wireless "a" maxed out at 11 Mbps, so wireless n is considerably faster.

How will I know what features are included on the Wi-Fi device I'm buying?

First off, Davis-Felner recommends looking for the Wi-Fi Alliance's 802.11n seal on routers and adapters to make sure you're getting a certified device. She estimates about 10 percent to 15 percent aren't certified and will work, but not at top efficiency. For other features, scan the back of the box or search the Wi-Fi Alliance's for a feature list.

I already have an 802.11n router. What gives?

Your device is actually using a . The alliance in 2007, and since then the discussion has focused on additional features to make Wi-Fi faster and more reliable.