Real-time communication is a category of software protocols and communication hardware media that gives real-time guarantees, which is necessary to support real-time guarantees of real-time computing. Real-time communication is a category of software protocols and communication hardware media that gives real-time guarantees, which is necessary to support real-time guarantees of real-time computing. The spacecraft communication network SpaceWire supports real-time communication. Time-Triggered Ethernet supports real-time synchronous communication in complex multi-hop Ethernet networks.