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A rough definition: a black hole is a block of the IP address
space for which there is no relevant routing information in a particular routing
table, right in the point where that information should have existed. In other
words a certain entity is considered to be the destination for that block, but
the entity itself does not know how to route that block.
This project tries to narrow the search for black holes by extracting a set of
IP zones where the black holes are most likely to be found.
The process is based on computing the difference in IP space between a reference
point (containing all the announcements on all the RRCs)
and the space announced by a particular peer (currently APNIC).
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