"I see a wide network. It says that it is using channel 11 + 7. What does that mean?"
40 MHz Channels, or "Channel Bonding"
With 802.11n, there are two possible channel widths:
| Channel Width | Channel Number Example | Notes |
| 20 MHz Channel | Channel 6 | Recommended in 2.4 GHz |
| 40 MHz Channel or "Channel Bonding" | Channel 11 + 7 | Not recommend in 2.4 GHz |
Using a 40 MHz channel in 2.4 GHz doesn't work well, because there just isn't enough room for it. It has a higher chance of causing and receiving adjacent and co-channel interference. In 2.4 GHz, we recommend using 20 MHz channels only.
The QA team with their 40 MHz channel. Ugh, you guys...
A 20 MHz channel. Much better.
Look for an option on your router to disable "Channel Bonding", or a "Channel Width" setting that allows you to select a 20 MHz channel. You can find out how to access your router configuration page here.