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IP Address Allocation History

IP Address Allocation History. 1981 - IPv4 protocol published 1985 ~ 1/16 of total space 1990 ~ 1/8 of total space 1995 ~ 1/3 of total space 2000 ~ 1/2 of total space 2002.5 ~ 2/3 of total space This despite increasingly intense conservation efforts

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IP Address Allocation History

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  1. IP Address Allocation History 1981 - IPv4 protocol published 1985 ~ 1/16 of total space 1990 ~ 1/8 of total space 1995 ~ 1/3 of total space 2000 ~ 1/2 of total space 2002.5 ~ 2/3 of total space • This despite increasingly intense conservation efforts • PPP / DHCP address sharing NAT (network address translation) • CIDR (classless inter-domain routing) plus some address reclamation • Theoretical limit of 32-bit space: ~4 billion devicesPractical limit of 32-bit space: ~250 million devices (RFC 3194)

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