do windows server 2003 dynamic update package exist?

my name is jean , I have bought this book and I found a problem with it in chapter 2 section about dynamic update process the author in the first step says to surf to : and download the dynamic update package and result that the package it does not exist on the link ,even if I search on any search engine ; now I m stuck on this chapter trying to do my homework for school .
please reply me with a certain answer about it at
thanks a lot
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