A silent host is a host that does not announce its presence. They don’t announce themselves, therefore can’t be proactively learned.
Examples are IP-based IoT endpoints operating in speak-when-spoken-to mode.
How to get silent hosts out of Silence ?
Layer 2 flooding is feature that enables the flooding of broadcast, link-local multicast, and ARP traffic for a given overlay subnet.
However, some networks need to utilize broadcast, particularly to support silent hosts which generally require reception of an ARP broadcast to come out of silence.
