<p>Abstract from <a href="https://tools.ietf.org/html/rfc3442" rel="nofollow">https://tools.ietf.org/html/rfc3442</a></p>
<blockquote>
<p>a new Dynamic Host Configuration Protocol (DHCP) option which is passed from the DHCP Server to the DHCP Client to configure a list of static routes in the client.  The network destinations in these routes are classless - each routing table entr includes a subnet mask.</p>
</blockquote>
<p>Further text from RFC3442</p>
<blockquote>
<p>Classful routing is no longer in common use, so the DHCP Static Route option is no longer useful.  Currently, classless routing is the most commonly-deployed form of routing on the Internet.</p>
</blockquote>

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