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<section id="about-virtual-networks">
    <title>About Virtual Networks</title>
    <para>A virtual network is a logical construct that enables multi-tenancy on a single physical network. In &PRODUCT; a virtual network can be shared or isolated.</para>
    <xi:include href="isolated-networks.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
    <xi:include href="shared-networks.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
    <xi:include href="runtime-allocation-virtual-network-resources.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
</section>