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IPV6 and IPV4 anycast

Unanswered Question
Jan 29th, 2006
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1- Does IPV4 have anycast ?

http://www.ietf.org/rfc/rfc1546.txt




http://book.itzero.com/read/cisco/0...15lev1sec3.html

" Anycasting, however, is a completely new concept that is unique to IPv6 "


http://tools.ietf.org/html?rfc=2526









2- "TCP/IP Protocol Suite" Book, third edition by Forouzan says:


"Anycast address defines a group of computers with addresses that have the same prefix.


For example, all computers connected to the same physical network share the same prefix address. A packet sent to an anycast address must be delivered to exactly one of the members of the group- the closet or the easily accessible-.".


In another Book "Data Communications and Networking" 3th Edition he mentioned same thing Chapter 20 page 531 :

"An anycast address defines a group of computers with addresses that have the same prefix. For example, all computers connected to the same physical network share the same prefix address. A packet sent to anycast address must be delivered to exactly one of the members of the group-the closest or the most easily accessible"



I am looking to understand the phrase (same prefix, and same physical network)


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