Researchers Chart Internet's 'Black Holes'

Hank Nussbacher hank at
Thu Jun 7 16:45:21 UTC 2007

"Despite its robust appearance, more than 10 percent of the internet 
flickers out like a candle every day, according to researchers who 
unveiled on Wednesday an experimental tool that probes the network's dark 

Ethan Katz-Bassett, a computer science Ph.D. candidate from the University 
of Washington introduced Hubble -- a network of deep cyberspace probes 
scattered around the internet - at the meeting of the North American 
Network Operator's Group in Bellevue, Washington. For two weeks Hubble 
queried a sample of 1,500 internet prefixes (a small subsection of the 
net) every 15 minutes. In the end it found that 10 percent of those 
prefixes couldn't be reached from certain corners of the internet."


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