1. 1. IEEE Transactions on Knowledge and Data Engineering, Vol 19,No.8, August 2007.
   2. D.Eastlake, Domain Name System Security Extensions, RFC 2535, Mar’99.
   3. P. Mockapetris, Domain Names - Concepts and Facilities, RFC 1034,Nov 1987.
   4. P.Mockapetris, Domain Names - Implementation and Specification, RFC 1035, Nov. 1987.
   5. Wellington, Secure Domain Name System Dynamic Update, RFC 3007, Nov. 2000.
   6. Internet System Consortium, hhttp://ttp://www.isc.org,2006
   7. Dynamic DNS Provider List, http://www.technopagan.org/dynamic/2006.
   8. IRcache home page, http://www.ircache.net/2006.
   9. V.Ramasubramanian and E.Sirer, “The Design and Implementation of a Next Generation Name Service for the Internet”, Proc.ACM Ann. SIGCOMM-’04, pp. 331-342, Aug 2004
   10. Content delivery and Distribution Networks, http://www.webcaching.com/cdns.html,2006.