Peer-to-peer

1. Peer-to-peer can divide into 2 types
- Structured p2p
By far the most common type of structured P2P network is the distributed hash table (DHT).  There are many system using DHT technical including  Bittorent tracker, he Kad network, the Storm botnet, YaCy, and the Coral Content Distribution Network.

- Unstructured p2p
Ex. Gnutela