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
Read more about this topic: IPv4 Address Exhaustion
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