Class(less) Networking (was Re: [Exim] question about ACL)

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Author: Adam D. Barratt
Date:  
To: exim-users
Subject: Class(less) Networking (was Re: [Exim] question about ACL)
Matthias Lewandowski wrote, Friday, December 12, 2003 12:46 PM

> isn't a class C the same as /24?


Yes and no. Both contain 256 addresses, but `Class C' defines only a limited
number of them.

> (maybe there's another definition of a class c
> i'm not common with...)


<URL:http://www.burningvoid.com/iaq/network-class.html>, for instance. The
traditional `classes' refer not only to the /size/ of the network, but to
the actual network space allocated - a Class C network can only range from
192.0.0.0 to 223.255.255.0.

That's one of the reasons that CIDR (/24 etc) was created.

Adam