This part of IEC 61784 specifies: - performance indicators supporting classification schemes for Real-Time Ethernet (RTE) requirements; - profiles and related network components based on ISO/IEC 8802-3 or IEEE 802.3, IEC 61158 series, and IEC 61784-1; - RTE solutions that are able to run in parallel with ISO/IEC 8802-3 or IEEE 802.3 based applications. These communication profiles are called Real-Time Ethernet communication profiles.