Nodes exchange peer information using epidemic-style broadcasts. This is peer discovery through propagation, not structured lookup.

Characteristics

Discovery emerges from local neighbor exchanges.

Works well in unstructured or dynamic networks.

Naturally resilient but imprecise.

Use Cases

Ad-hoc networks.

Systems built on epidemic or fan-out replication.

Examples

libp2p's gossipsub peer exchange.

Early Gnutella-style ping/pong discovery.