I have an idea for an ios(iPhone) application to which requires connecting to several peers. I am basing my code on the WiTab (SampleCode-developer.apple.com) example.
Its pretty hard to modify the Apple.Developer Witap application because you need to hold all the resolved adresses , have to modify all the methods and handle lot.
I think this tutorial will achieve your goal.
The app is called “Chatty.” Its source code is located here
Download the App --> Open --> Click-on Chatti project tab --> Build Settings --> Change the base SDK to iOS6
it is being released under the MIT license, which means that you are free to modify and reuse it at will
In this tutorial, They are going to explore a simple chat application for the iPhone. It allows you to host your own chat room and advertise it on your local Wi-Fi network (in which case your app acts as a chat “server”) or find and join chat rooms hosted by other people on your network (acting as a chat “client”). Both announcement and discovery of chat rooms are implemented using Apple’s Bonjour protocol same as Witap Application
Now I'm answering your each questions
Is it possible to connect more than one device simultaneously over WiFi?
YES, You can
If yes,What is the maximum number of device that can be connected in same pattern?
I think you can pair with any number of devices
Which type of CFSocket is useful for multiple Connection(TCP/UDP)?
My suggestion is TCP
The remaining answers for your questions can be easily understand from the sample Chatty App :)
Note: The server and clients need to be on the same WiFi network