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ACL on Cisco router

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In Access list on Cisco router the subnet mentioned 0.0.0.7 for some of the public ip address. what is it mean?. Please explain me

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by nico baggus

You can use this f.e. if you have a range of
systems say 4 pc's with address x.y.z.20, 21, 22,
23 to access a remote network a.b.c.0 ->
a.b.c.255...

it would be:
permit ip x.y.z.20 0.0.0.3 a.b.c.0 0.0.0.255

The talk of network address and broadcast address
only get meaning when applied to an interface.

In your case it specifies the 8 addresses with
the addres mentioned before this wildcard mask as
base. (it needs to be on a divisable boundary
though.

So for 0.0.0.7 it needs to be a.b.c.0, a.b.c.8,
16,24,32...248.

Kind regards,
Nico

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