"Sunrise" features improved Internet connectivity and implements a peer-to-peer system allowing players to share car models, skins, and more.

Both were peer-to-peer systems, where no specialist server was required, but instead all PCs on the network could share their resources.

The main drawback to peer-to-peer systems is that when a PC acts as a server, it can slow down significantly.

A peer-to-peer system was also created at the time, named Presence.

This reflects poorly on the credibility of current peer-to-peer systems.

Also, peer-to-peer systems connect users through other users' computers, so a failure at one point in the network will affect every computer connected to that network.

Continuous graphs have applications to peer-to-peer systems.

In centralized peer-to-peer systems, a central server is used for indexing functions and to bootstrap the entire system.

Another important property of peer-to-peer systems is the lack of a system administrator.

An earlier generation of peer-to-peer systems were called "metacomputing" or "middleware".