What is correct regarding GCM - Google Cloud Messaging service?

Question:What is correct regarding GCM - Google Cloud Messaging service?

1.It does server to device communication.

2.It does device to server communication.

3.It does device to server communication and vice versa.

4.It does device to device communication.


Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!