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freebsd-ports/net/whatmask/pkg-descr
Ying-Chieh Liao 5640f019e8 add whatmask
Easily convert between three common subnet mask notations
2001-05-20 11:23:36 +00:00

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Notations supported:
Name Example
---------------------------------
CIDR /24
Netmask 255.255.255.0
Wilcard Bits 0.0.0.255
The above notations are all identical. CIDR notation commonly has a "/" in
front of the number (representing the number of bits). Whatmask can accept
these notations with or without a slash. This notation is used more and more
recently. A lot of popular routers and software supprt this notation.
Netmask notation is pretty much the standard old-school way of doing it. It is
supported by most systems (Un*x, Win, Mac, etc.).
Wilcard bits are similar to the netmask, but they are the logical not of the
netmask. This notation is used by a number of popular routers (and nobody
knows why...).
WWW: http://www.laffeycomputer.com/whatmask.html