Common operational misconceptions

Leigh Porter leigh.porter at
Thu Feb 16 08:32:07 UTC 2012

On 15 Feb 2012, at 20:50, "John Kristoff" <jtk at> wrote:

> Hi friends,
> As some of you may know, I occasionally teach networking to college
> students and I frequently encounter misconceptions about some aspect
> of networking that can take a fair amount of effort to correct.
> For instance, a topic that has come up on this list before is how the
> inappropriate use of classful terminology is rampant among students,
> books and often other teachers.  Furthermore, the terminology isn't even
> always used correctly in the original context of classful addressing.

When I took an A level computing course in the 90s the course material still talked about primary stor and backing stor, batch jobs and the like...

Needless to say I quit in disgust but the point is that the people who write these courses are often woefully out of touch.


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