The WhatsApp client on Android is built using a heavily customized version of the Smack library. XMPP, like HTTP, allows the client to open an XMPP server as soon as it is logged into the socket. WhatsApp has adapted XMPP to work with its own messaging system, providing a fast and reliable way to send and receive messages. XMPP is an open standard that is used by a variety of applications, including Google Talk and Facebook Messenger. But how does WhatsApp work under the hood? The app uses a protocol called XMPP (Extensible Messaging and Presence Protocol) to provide its messaging service. One of the things that makes WhatsApp so popular is its simplicity – it’s easy to use and doesn’t require any special setup. The app uses the internet to send and receive messages, making it a convenient way to stay in touch with friends and family. WhatsApp is a popular messaging app that allows users to communicate with each other using text, audio, and video messages.
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