(E-Mail Removed) ("David G. Bell") wrote in
news:(E-Mail Removed):
>> Sounds like someone didn't understand the basic principles behind the
>> internet, and actually set up a hierarchical private communications
>> structure.
>>
>> A single link or node failure (or even multiple failures) will not
>> cripple the real world internet, which was originally designed to
>> carry on working after a nuclear war!
>
> It certainly seems odd that it seems to have taken down services, like
> the whiteboards, that don't obviously depend on off-site features.
It comes down to a couple of problems. Both the network resiliency and
the configuration of hardware such as whiteboards.
Whiteboards can function stand-alone, but as mentioned in the original
article they can also be linked to Internet based content. In this case,
those linked to Internet based content could not operate and the teachers
probably didn't have a clue how to switch them to local content - which
could possibly be a benefit as things go wrong when people start to
fiddle..
Oh and the theory that the 'real world' Internet can route round problems
is a very good one, except what actually happens is that routes get
confused and budgets mean that things are often stuffed through the same
cable as opposed to being properly resilient.
Take out a few buildings in London, or a few Cornwall cable landing
points and the UK Internet and many web services would be completely
screwed for quite some time.
--
Colin
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