Wikipedia entry on Denial of Service <br>
<a href=\"http://en.wikipedia.org/wiki/Denial-of-service_attack\">http://en.wikipedia.org/wiki/Denial-of-service_attack </a>
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Tcp Syn Floods <br>
<a href=\"http://www.iss.net/security_center/advice/Exploits/TCP/SYN_flood/default.htm\">http://www.iss.net/security_center/advice/Exploits/TCP/SYN_flood/default.htm </a>
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Land Attack wikipedia <br>
<a href=\"http://en.wikipedia.org/wiki/LAND\"> http://en.wikipedia.org/wiki/LAND </a>