Additionally, as messages can be delivered to multiple clients, Jabber addresses can have specific clients specified by appending a slash and the client's name to the end of the address. For this reason, Jabber addresses mimic email addresses, with each part of the address serving the same purpose as it's counterpart in an email address. Only then is the message pushed to the recipient's client. A Jabber user who wants to send a message to another user contacts his own XMPP server, which relays the message to the recipient's server. This differs from popular proprietary IM protocols such as AIM, ICQ, MSN Messenger, and Yahoo Messenger, which all must communicate, or at least establish a connection, via a central server. ![]() Unlike other IM protocols, Jabber is decentralized, meaning that there is no central server regulating it's use. Additionally, the term "Jabber" also refers to faulty network equipment, which broadcast redundant or excessive data packets. As the Jabber project is open source, Jabber instant messaging clients have been developed for all major operating systems including Linux, Windows, and Macintosh, as well as mobile solutions for PDAs, cellphones, and even telephone interfaces. Any email server or other webserver can be modified to accommodate Jabber technologies, even those isolated from the public Internet. XMPP, or Extensible Messaging and Presence Protocol, is an open source IM protocol designed to facilitate email using similar resources. Jabber is the trade name of the XMPP instant messaging protocol.
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