The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Web wide crawl with initial seedlist and crawler configuration from October 2010
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20110106194850/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/p2p
P2P (Peer to Peer) is the term used to describe computers that can connect to each other via the Internet. As the computers are on the network they don't need to use a central server. So each computer will become both the file server and the client.