Re: AW: [Exim] question about ACL

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Συντάκτης: Michael Haardt
Ημερομηνία:  
Προς: exim-users
Αντικείμενο: Re: AW: [Exim] question about ACL
> isn't a class C the same as /24?

It has the same size, but it is not the same thing. A class C network
is a /24 with the bit prefix marking it as a class C network. A /24
that is part of a class B network, as often encountered at older internet
sites, is _not_ a class C network, it's a subnet of a class B network.

The difference is only relevant for classful routing, which is history
these days, and for good reasons. See

http://public.pacbell.net/dedicated/cidr.html

for details.

Michael