[Olipro]

Nobody's going to run a /8 on a single LAN segment.

If you want maximum efficiency, your hosts all have RFC1918 IPs and you route the public IP addresses to them. zero wastage, everything usable.

[icedchai]

When I went to college in the mid 90's, the entire campus was on a /16, flat network, every machine had a 255.255.0.0 netmask. There was no subnetting, everything was switched (they said "bridged" at the time.)

With today's switches, you could do much crazier things. Definitely not an /8 though.

[jonathantf2]

I have unfortunately seen that many a time.

[DonHopkins]

That's the joke! Imagine not getting caught these day running a giant routable stolen class A network on a single LAN segment. It would require Trump-level audacity!