[vox-tech] netmask question

[Ryan]

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On Sunday, March 10 2002 12:46 pm, Jeff Newmiller wrote:
> On Sun, 10 Mar 2002, Ryan wrote:
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> > Netmasks are not for sepcifing ip ranges, they're for specifing netwo=
rk
> > size.
> >
> > You'll should specify this as  7 255.255.0.0 netmasks.
>
> The idea that netmasks must break on octet boundaries is ancient histor=
y.
> See Section 5 of RFC1338 at, for example, http://RFC.net/rfc1338.html.

I know that.....

> > A netmask should always be x number of one bits, followed by all zero=
s,
> > hence the /x shorthand.
> >
> > as an example, 255.255.255.16 would not be a valid netmask, but
> > 255.255.255.192 would.
>
> The "validity" of the netmask depends on convention, but it is true tha=
t
> it is highly unlikely to be useful to create discontiguous netmasks.
>
> [...]
>
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