nanog mailing list archives

Re: Stupid Question maybe?


From: Grant Taylor via NANOG <nanog () nanog org>
Date: Tue, 18 Dec 2018 12:31:36 -0700

On 12/18/2018 11:44 AM, Scott Weeks wrote:
It's good to have at least a passing understanding of the old terminology simply because documentation for newer stuff likes to reference it...

Agreed.

I seldom see people actually talking about class {A,B,C,D,E} networks as such. It's almost always a reference to the size ~> netmask ~> prefix of a network.

Plus it's fun (and informative about a netgeek's skill) when they call, say, 72.234.7.0/24 a Class C and you can say no it's not. Then you see if they can say why. If they can't, well...ummm... I really mess with them after that. It helps pass the work day. >;-)

You can safely say that 72.234.7.0/24 is a Class C /sized/ network. While it happens to be in the (former) Class A IP /range/. But it is most decidedly /not/ a Class A /network/.

ps.  Be sure to send Wikipedia a small Christmas gift.  It's invaluable.

Agreed!



--
Grant. . . .
unix || die

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