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/20110107051329/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/vpi
VPI (Virtual Path Identifier) is a header that has 8-bits that is inside each ATM cell that tells the ATM where to route the packet data to. Many ISPs use this method to transfer data between client computers.