The History Of Private Address Space

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According to RFC 1918

The Internet Assigned Numbers Authority (IANA) has reserved the
the following three blocks of the IP address space for private internets:

10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)


But why did you choose these bands?
After all, they don't go in order, from the beginning of the address space and are not round numbers.
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2 Answers

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Originally networks were divided into classes ABC and began to disassemble And starting with the biggest. Tenth went to the ARPANET — the Internet proroditelnitsey. She was later cut down, and the addresses given in private.
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So, still thinking about the allocated private addresses because it is convenient to work with units that gave the first free aligned blocks of 16 and 256 networks, classes B and C. Those were the networks.
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got comrades, hryapnul beer, devoured chips and invented. Well, I think that was some kind of intent or Kabbalah.
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