>
>I understand that especially for computer networks there is another, grave, potential problem: the reflected energy will turn up as a false signal.

This is very true.

>
>I am giving CNAp courses (Cisco Network Academy program), and the question turned up there.
>
>In my case, we are still talking about computers - but the computer networks are way off my previous (and still current) life as a computer programmer! (My studies, OTOH, were related to computer hardware - but not too much about networks, either).
>
>I was all very sudden. In July, a certain Tuesday, an old friend from the city of Santa Cruz told me (and another friend) about this networking course (which they wanted to start teaching in Cochabamba). On Sunday, we flew off to Buenos Aires, Argentina, for the instructor-training course.
>
>Hardly enough time to review the course materials, which we were supposed to read beforegetting to Buenos Aires.
>
>Before that, I had heard the name, "Cisco", only in passing.

I pass Cisco every day on the way to and from work. So many buildings! They had big plans to expand even more but the economy is not ready for that to happen.


>
>The CNA is the largest "e-learning" offering in the world, with more than 200,000 students worldwide. Quite surprising for an offering which seems to fit only a certain vertical market (you wouldn't want to take a 4-semester course on computer networks to fix the computer network at your home).
>
>Hilmar.

I have had my share of computer networks from the ground up. The best to you.

Tom