title: how push notification works and what is the requirements of it?
body: <p>i want to know how do i enable my application to use push notification service.i read the guide but doesn't find it much detailed information about it.Could someone tell me an easy way that how it works,what are the requirements,how do i apply this in my app. one thing i would like to know that according to guide the connection between provider and APNs must be asynchronous,What does it mean? also i read that if we continuously connect and disconnect APNs will block the IP. so what is the minimum time difference to connect to APNs after disconnecting.Please guide me in according to the question.thanks</p>