Peer-to-Peer

Chapter 1. A Network of Peers: Peer-to-Peer Models Through the History of the Internet

Nelson Minar and Marc Hedlund, Popular Power

The Internet is a shared resource, a cooperative network built out of millions of hosts all over the world. Today there are more applications than ever that want to use the network, consume bandwidth, and send packets far and wide. Since 1994, the general public has been racing to join the community of computers on the Internet, placing strain on the most basic of resources: network bandwidth. And the increasing reliance on the Internet for critical applications has brought with it new security requirements, resulting in firewalls that strongly partition the Net into pieces. Through rain and snow and congested Network Access Providers (NAPs), the email goes through, and the system has scaled vastly beyond its original design.

In the year 2000, though, something has changed—or, perhaps, reverted. The network model that survived the enormous growth of the previous five years has been turned on its head. What was down has become up; what was passive is now active. Through the music-sharing application called Napster, and the larger movement dubbed “peer-to-peer,” the millions of users connecting to the Internet have started using their ever more powerful home computers for more than just browsing the Web and trading email. Instead, machines in the home and on the desktop are connecting to each other directly, forming groups and collaborating to become user-created ...