&gt; No, you don&#x27;t. The biggest benefit to using IPv4 as the routing-infrastructure and extra bits (maybe an IP option) to describe the host is that most of the Internet (routers, etc) don&#x27;t need to get upgraded, only hosts. Routers don&#x27;t normally mess with the packets so only the first&#x2F;last wifi&#x2F;switch actually need upgrading. This is a small number of devices (certainly much smaller than all!).<p>What does WiFi or a switch even have to do with this?