Via tgdaily.com -
The reason why you cannot reach a specific web site at any given time can be very simple. Server and hosting issues, maintenance or the plain fact that a site has been discontinued are the most likely explanations why a site just won’t load. But there is another, more mysterious possibility: Black holes. A team at the University of Washington (UW) has begun mapping scenarios where information packets on the Internet simply disappear.
"There's an assumption that if you have a working Internet connection then you have access to all of the Internet," said Ethan Katz-Bassett, a UW doctoral student in computer science and engineering. "We found that's not the case."
Katz-Bassett has been working on a project called Hubble, a system that apparently is able to track what he refers to as information black holes. These are situations where a path between two computers does exist, but messages - a request to visit a Web site or an outgoing e-mail - get lost along the way. Katz-Bassett has published a Hubble map that enables users to monitor such black holes worldwide or simply type in a network address to check its status.
To determine a network status, Hubble sends test messages “around the world” to look for computers that can be reached from some but not the entire Internet, a situation that is described as “partial reachability”. Katz-Bassett said that short communication blips are ignored. However, if a problem surfaces in two consecutive 15-minute trials, it is listed as a “problem”. The research team found that more than 7% of computers worldwide experienced this type of error at least once during a three-week period in fall of 2007.
"When we started this project, we really didn't expect to find so many problems," said Arvind Krishnamurthy, a UW research assistant professor of computer science and engineering and Katz-Bassett's doctoral adviser. "We were very surprised by the results we got."
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Very interesting....
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