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17 lines
537 B
Markdown
17 lines
537 B
Markdown
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# Timeline
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* 1972 ARPANET rolled out
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* 1981 TCP/IP rolled out
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* 1992 CIDR developed
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The original IPv4 address space was a 32 bit "address extension" to the ARPANET
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address space, which only supported 256 nodes. We carved up the world into into class A, class B, class C, class D (multicast), and class E (reserved).
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It seemed an eminently good division at the time. By 1989, however, it was
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obvious that these divisions were straining at the seams, and CIDR was developed
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to fix it.
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* 1994 IPv6 started
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* 2012 IPv6 rollout started
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