RFC 1918 network range choices

William Herrin bill at herrin.us
Thu Oct 5 23:14:46 CST 2017


On Thu, Oct 5, 2017 at 1:32 PM, Jerry Cloe <jerry at jtcloe.net> wrote:

> Several years ago I remember seeing a mathematical justification for it,
> and I remember thinking at the time it made a lot of sense, but now I can't
> find it.
>

Hi Jerry,

If there's special ASIC-friendly math here, beyond what was later
generalized with CIDR, it's not obvious.

10.0:    0000 1010 0000 0000

172.16:  1010 1100 0001 0000

172.31:  1010 1100 0001 1111

192.168: 1100 0000 1010 1000

AFAIK, it was simply one range each from classes A, B and C.

Regards,
Bill Herrin


-- 
William Herrin ................ herrin at dirtside.com  bill at herrin.us
Dirtside Systems ......... Web: <http://www.dirtside.com/>


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