A "mesh network" combines wired and wireless networking technology to create a self-healing, fault tolerant high speed network capable of operating on licensed and unlicensed spectrum.
Mesh networks can provide access to the internet as well as "advertised services" to provide unique content and capabilities to network end users. The services available on a mesh network would still be operational and accessible even if the internet was not available.
Examples of "Advertised Services" range from cameras, weather sensors, software defined radio receivers, Voice Over IP, file servers and much more.
The Amateur Radio Emergency Network (AREDN) is the leading platform for mesh networks the amateur radio community is building out globally.