IP Address Exhaustion - Early Mitigation Efforts

Early Mitigation Efforts

Efforts to delay address space exhaustion started with the recognition of the problem in the early 1990s, and include:

  • Use of network address translation (NAT), in which many computers share one IP address, but which makes the computers behind the NAT unaddressable from the outside, breaking end-to-end connectivity
  • Use of private network addressing
  • Name-based virtual hosting of web sites
  • Tighter control by regional Internet registries on the allocation of addresses to local Internet registries
  • Network renumbering and subnetting to reclaim large blocks of address space allocated in the early days of the Internet, when the Internet used inefficient classful network addressing

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