Thread
Thread is the networking layer under Matter — when you see Matter over Thread, Thread is doing the mesh networking. Understanding the border router, DTLS commissioning, and leader/router/end-device roles is required for Matter deployments.
What It Defines
Thread is an IPv6-based mesh networking protocol for IoT built on IEEE 802.15.4. Provides self-healing mesh, border router with NAT64 (IPv6 to IPv4), 6LoWPAN header compression, and DTLS-based security. The networking layer for Matter in smart home deployments. Backed by Apple, Google, and Samsung.
Canonical (Normative)
Convenient (Practical)
Industry consortium (formerly Zigbee Alliance) that develops IoT connectivity standards. Merged with the Thread Group. Maintains Matter (smart home unification), Zigbee, and Z-Wave specifications. Members include Apple, Google, Amazon, Samsung, and all major IoT chipmakers.
Related Specs
Matter is the end-state for smart home interoperability. Any connected home product launched today needs Matter support. Understanding commissioning, fabric topology, and the data model is essential for IoT product developers.
Zigbee is installed in hundreds of millions of devices. Smart lighting (Hue, IKEA Trådfri), home hubs (SmartThings, Home Assistant), and building automation all use it. Understanding ZCL clusters and coordinator setup is required for integrations.
CoAP is the HTTP of the IoT world — same REST semantics, fraction of the overhead. Used in NB-IoT NIDD, LwM2M device management, and any embedded system where TCP overhead is prohibitive.