Despite major changes to the IP addressing architecture, core Internet routing tables continue to grow at a greater-than-linear rate (now at >140,000 entries). The IPv6 solution requires end-user networks to renumber from time to time. There is widespread concern that users will refuse to do this, and that IPv6 will therefore not solve the problem. This is in addition to the concern that IPv6 simply won't be deployed at all. IPNL (IP Next Layer) is an alternative internet protocol design that solves the scaling problem by isolating end-user networks from the global address space. It leverages the DNS naming system and the de facto NAT (Network Address Translation) architecture. This talk describes the current Internet addressing architecture and the root causes of the scaling problem. It describes how NAT, as an address isolation technology, solves those problems. Finally, it describes IPNL, and how it leverages the advantages of NAT while overcomes its weaknesses.