 SIMPLE (military communications protocol)

SIMPLE (SIP for Instant Messaging and Presence Leveraging Extensions) is a protocol that was developed to facilitate instant messaging and presence information in military communications. It is based on the Session Initiation Protocol (SIP), a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video, and messaging applications. Key features of SIMPLE include: 1. **Instant Messaging**: SIMPLE supports real-time text communication, allowing users to send and receive messages almost instantly.