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by kazen44
1723 days ago
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this comments hit up a good point, the lower in the OSI stack you go, the harder it is to initiate change. There is still some (mostly industrial) hardware that has lackluster TCP/IP support at best (for instance, assuming the netmask is always a /24...). migrating these networks to ipv6 is not possible, and doing 6to4 adds a crapton of complexity. |
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We can, and do, make massive , non-backwards-compatible changes in layers 1 and 2 every few years and no one is the wiser. Layer 3 is special. It makes that flexibility in all the other layers possible, but keeps none for itself.