why not document load modules instead of recompiling kernel??

Hi All,

When I read the freebsd handbook, I found many part of
document said it is needed to recompile the kernel.

for example,
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/firewalls.html

However, kldload ipfw also works. Why there isn;t any
words about this? Is loadable module not encourage? 

Thanks,

Jun Su

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