Wireless AP without need to conifg(like airport APs) need some help about them

hey there,
this is my very first thread in this forum,
so first of all I have to say hello everyone.
and also please accept my apologize if I choose a bad place to post my first thread or any other vandalism that I'v done
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my question is :
where can I find the AP without need any IP config or any other types of configuration to connecting to them.
for example in the airport such these APs are available.
is it a special hardware or not with software also is it available?
recently when I was in Bangalore(India) International Airport they had such this systems.
but i don't know how does it works or even i don't know the name of any particular system that provide such this ability.
please kindly help me out what is the name of these kind systems or any other thing that I can get further information about them.
regards

Wrong question.

Right question:
"How do I set my router up like that?"

Answer:
Turn DHCP on

hi ,
thanks for response,
I'm afraid it wasn't dhcp cause my laptop has IP : 192.168.1.50
and without any problem even without any config when I open IE a page has come and ask me for security code .
so is there any option available in dhcp that can broadcast 0.0.0.0 to all the network?
and without need any configuration for getting that setting from the router is it possible to work?
I believe it was something else.