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The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...
XMPP has often been regarded as a competitor to SIMPLE, based on Session Initiation Protocol (SIP), as the standard protocol for instant messaging and presence notification. [54] [55] The XMPP extension for multi-user chat [40] can be seen as a competitor to IRC, although IRC is far simpler, has far fewer features, and is far more widely used.
ejabberd is known to be used by XMPP-related sites and a number of companies, either for providing an XMPP instant messaging service, as a meeting chat room service, or as middleware for other software (usually by means of the Publish-Subscribe service).
Psi is a free instant messaging client for the XMPP protocol (including such services as Google Talk [4]) which uses the Qt toolkit. It runs on Linux (and other Unix-like operating systems), Windows, macOS and OS/2 [5] (including eComStation and ArcaOS). [6] User interface of program is very flexible in customization.
MSNP (Windows Live Messenger, etc.) Microsoft: 1999 Jul Proprietary: Email address (Microsoft account) Yes No No Only for certified robots No Centralistic Yes Yes Yes Yes Yes Yes No ? MSNP (Windows Live Messenger, etc.) MTProto Telegram Messenger LLP 2013 Aug Open standard: Phone number (e.g. +15550123), nickname (e.g. @example) Yes Yes
Prosody (formerly lxmppd [2]) is a cross-platform XMPP server written in Lua.Its development goals include low resource usage, ease of use, and extensibility. Prosody uses the default XMPP ports, 5222 and 5269, for client-to-server and server-to-server communications respectively.
Profanity is a text mode instant messaging interface that supports the XMPP protocol. [2] It supports Linux, macOS, Windows (via Cygwin or WSL), FreeBSD, and Android (via Termux). Packages are available in the Debian, [3] Ubuntu [4] and Arch Linux [5] distributions.
The landscape for instant messaging involves cross-platform instant messaging clients that can handle one or multiple protocols. [1] Clients that use the same protocol can typically federate and talk to one another.