Lots of people say so, but that doesn&#x27;t make it a useful model of IPv6.<p>When you think about IPv6, start with &#x2F;64 networks. That&#x27;s the basic unit. What a DSL customer gets from the ISP is a &#x2F;64 network, not some number of individual addresses. The customer may two, ten or 2047 of then, it doesn&#x27;t matter. The point is &quot;one owned DSL subscriber = one &#x2F;64 network&quot;.<p>Just like with IPv4, some people have larger allocations. But the basic allocation unit is a &#x2F;64 network.