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2. Internet Cache Protocol (ICP) version2 [Online]. Available at:
ftp://ftp.rediris.es/docs/rfc/21xx/2186
3. Korea National Cache [Online]. Available at
http://cache.kaist.ac.kr
4. National Laboratory for Applied Network Research (NLANR), “Ircache project”. [Online]. Available at
http://ircache.nlanr.net/
5. Spanish Academic Network (Red Iris) [Online]. Available at:
http://www.rediris.es/