Which of the following best describes an amateur radio mesh network?

An amateur radio mesh network (often called AREDN, or Amateur Radio Emergency Data Network) repurposes inexpensive, commercially available Wi-Fi routers by replacing their factory firmware with specialized amateur radio firmware. This allows the devices to operate on amateur frequencies adjacent to standard Wi-Fi channels, creating high-speed, self-discovering, and self-healing data networks. Other options are incorrect because mesh networks are not satellite TV networks, they are not DMR digital voice modes, and they are not internet-linking protocols like EchoLink or IRLP. They are strictly localized, RF-based data networks built from modified Wi-Fi gear.