How does APN push notification work?

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Tags

1. #notification
2. #receive
3. #accredited
4. #establishes
5. #encrypted
6. #propagates
7. #registered
8. #device
9. #applications
10. #service
11. #having
12. #receives
13. #devices
14. #persistent
15. #apple
16. #notifications
17. #connection
18. #those