On Thu, 30 May 2019 10:42:17 -0700, William Herrin said: > Heck, most networking courses still teach class A, B and C... definitions > which were explicitly invalidated a quarter of a century ago.
If you had asked me back in 1993 if I was going to be retired before class A/B/C was gone from common usage and documentation, I'd have called you a crazy person. I have to wonder how much the IPv6 deployment has been stalled by similar outdated documentation and coursework (like the "security" recommendation to "block all ICMP").
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