XMPP
XMPP (Extensible Messaging and Presence Protocol) is an open-standard communication protocol for instant messaging, presence information, and real-time data exchange. It uses XML for data structuring and operates over TCP/IP networks, enabling decentralized and federated messaging systems. Originally developed as Jabber, it is widely used for chat applications, IoT device communication, and collaborative tools.
Developers should learn XMPP when building real-time messaging applications, IoT ecosystems, or collaborative platforms that require interoperability and decentralization. It is ideal for scenarios needing federated communication (like email), secure end-to-end encryption, or integration with existing XMPP-based services such as chat servers or enterprise collaboration tools.