I have seen this question in one of the cisco exams !
The obvious answer was BUG ERROR !
----- Original Message -----
From: "John Neiberger" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, November 23, 2000 4:22 AM
Subject: Re: Line Down , Protocol Up ?
> Think this through starting at the first OSI layer. If the line is down
> (physical) layer, then how could the next higher layer--which depends on
> lower layers--ever possibly hope to function?
>
> It can't. You can't have a functional datalink layer without first having
> valid physical connectivity.
>
> > Hi Gang,
> > Just been looking at the binary possibilities of
> > these options i.e 0 0
> > 0 1
> > 1 0
> > 1 1
> >
> > And feel thet that Line Down, Protocol Up is
> > impossible.
> > Can anyone confirm this or has anyone seen anything
> > quirky of this nature.
> >
> > Regards,
> >
> > Phil.
> >
> >
> >
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