While using a friend's wifi, he said I should use his SSID, let's call it XYZ's Wifi. When I started my Macbook Pro, three SSIDs came up. Two were called XYZ's Wifi and the third was called XYZ's Guest Wifi. One of the ones called XYZ's Wifi disappeared within 1-2 seconds and did not reappear. But the "guest" wifi did persist and I was told not to use it.
Are there actually Wifi boxes out there that support two simultaneous SSIDs?
I advised him that maybe a neighbor is using a router with the same/similar name to trick him, and capturing packets.
How can I tell whether they are actually both in the same router, or different routers?
On the Mac it seems we don't have an iwconfig command, so I don't know how I can print out the MACs of these router(s).