Google provides an XMPP Interface to their push notification service. It's also been rumoured that push notifications are delivered to the device via a proprietary binary XMPP protocol. Apple uses XMPP to deliver push notifications to client devices.
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Answer:
Google provides an XMPP Interface to their push notification service. It's also been rumoured that push notifications are delivered to the device via a proprietary binary XMPP protocol. Apple uses XMPP to deliver push notifications to client devices.
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Answer:
a. Central Broker
Explanation:
refer this site (use single '/' to visit instead of '-')
xmpp-org