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anycast

   Also found in: Wikipedia 0.01 sec.
anycast
A technique for updating routing tables in IPv6, the next generation of IP addressing. Anycast sends a message to the nearest router within a group. That router in turn sends it to its nearest router. Starting in 2003, additional root servers on the Internet were replicated using the Anycast method. See IPv6 and root server.


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Anycast is a network addressing and routing scheme whereby data is routed to the "nearest" or "best" destination as viewed by the routing topology.
The new root name server will use anycast technology to reduce the impact of possible denial of service attacks.
While there are 13 logical roots, with 13 unique IP addresses, since the October 2002 attacks there have been efforts underway to place mirrors of these servers in diverse locations, using IP anycast to appear like one server.
 
 
 
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