SIMPLE (instant messaging protocol)

SIMPLE, the Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions, is an instant messaging (IM) and presence protocol suite based on Session Initiation Protocol (SIP) managed by the Internet Engineering Task Force.

This article is about the instant messaging protocol. For the military communication protocol, see SIMPLE (military communications protocol).
Internet protocol suite
Application layer
Transport layer
Internet layer
Link layer
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