How push notifications work?

Hi. Tell me, how does the push. Where to start?
July 4th 19 at 23:36
1 answer
July 4th 19 at 23:38
Push notifications is a TCP/IP packet that the server sends to the clients connected to it and enabled the connection open (keep-alive), is to start with, on the one hand the implementation of a simple client-server (TCP/IP) applications, and on the other hand, the study of ready-made libraries for Push notifications like Google cloud messaging.

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