Researchers Map the Internet

RESEARCHERS MAP THE INTERNET
[SOURCE: Associated Press, AUTHOR: Anick Jesdanun]
It took two months and nearly 3 billion electronic probes for University of Southern California researchers to create a map of the Internet. Now comes the task of making sense of their data, and figuring out what they missed. Over two months, computers sent queries to about 2.8 billion numeric "Internet Protocol," or IP, addresses that identify individual computers on the Internet. Replies came from about 187 million of the IP addresses, and researchers used that data to map out where computers exist on the Internet. At one dot per address using a typical printer, the resulting map was about 9 feet by 9 feet. The top finally was taped onto the 8-foot-high ceiling.
http://www.phillyburbs.com/pb-dyn/news/95-10102007-1421509.html

See http://www.isi.edu/ant/address/