The wifi radio space is crowded, so scanning which channel(s) are the least crowded is advisable.
What is a good tool to do this task? It should
- List all nearby AP's with radio channel, SSID, MAC Adress and encryption type
- Scan both 2.4Ghz (802.11b/g/n) and 5Ghz(802.11a/n) frequencies
- Be compatible with Windows 7 and 8
- Be free or very cheap