Strange “Devices” section in iOS Wi-Fi Settings Has anyone ever seen this ‘Devices’ section in the Wi-Fi Settings page?

It very strange, it's my first time I've seen this. Even more, when I tried to connect to this SSID, iOS pops up a dialog which says "x is not connected to the Internet; Are you sure you want to use this network?"

What is this? How was this achieved?
This can happen when (for example) a MacBook computer was used to create it's own Wi-Fi network. 

The pop-up you see indicates that after you connect to this SSID you won't have internet access. 

Such networks are called Ad-Hoc networks (more info: Wiki) .