[ale] detecting an unplugged network cable?

[hirsch at zapmedia.com]

Is there any way to detect when a network cable gets unplugged?  My
windows colleagues say that windows can tell within seconds of the
cable being yanked that there is no network, but I can't.  The card is
clearly aware of it, too, since the green light goes out, but I don't
know how to check for the connection.  Is there a way?

Thanks,

Michael
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