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Suppose I use ifconfig or some similar command to setup my network interface, and I assign to the mask parameter. Does it have a special meaning? What implications could this have?

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up vote 2 down vote accepted generally means that the network interface isn't bound to any network at all, not even localhost requests will be acknowledged. If anything it's a way of the operating system to present the interface as available but inactive and un-routed.

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Would ARP Request from the host owning said interface work? –  dario_ramos Jul 3 '11 at 21:58
I don't think it would, it doesn't in Windows in any case. –  Ruairi Fullam Jul 3 '11 at 22:10
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