Setting up a network and sharing internet

Ian Zimmerman nobrowser-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
Tue Aug 23 14:07:05 UTC 2005


On 8/23/05, Lennart Sorensen <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org> wrote:
> On Tue, Aug 23, 2005 at 06:08:03AM -0400, Scott Allen wrote:
> > Points below mosly for educational purposes:
> >
> > Actually, there are cable-only methods for more than two machines,
> > called
> > 10-base2 or 10-base5. They link 10M ethernet over a coaxial cable
> > without
> > hubs.
> 
> I don't think I have ever seen 10base-5 myself.  Few places seemed to
> want single segments of 10mbit ethernet running for up to 500m.  200m
> was plenty for most, and much cheaper to wire too given 10base-2 was
> much more common and the wire much cheaper.
> 
> Of course it was a bit of a pain that to add machines you have to split
> the cable, put in a T and add it to the new machine, causing an
> interruption in the network.
> 
> > The are small differences between using a crossover cable or a
> > hub/switch, which can slighty affect the way the systems behave.
> > 1) With a hub you will get a half-duplex connection. With a switch or
> > crossover it will likely be full-duplex. As already noted in another
> > posting in this thread, the difference is generally insignificant.
> > 2) The hub/switch will usually always be powered up. Therefore when
> > one machine is powered off or disconnected, the network connection on
> > the other machine will still be "alive". With a crossover, when one
> > machine is powered off or disconnected, the other may see a dead
> > ethernet link. (I say "may" because some machines will keep the
> > ethernet active using standby power when "off" to allow for power up
> > control via ethernet). This may result in more or different error
> > messages, logs, etc. between one or the other method.
> 
> I think the ability to add and remove machines at will, nice cheap
> twisted pair wire, not having to run the network around through each
> machine, but instead having a central point to connect to just makes way
> more sense, and I sure don't miss 10base-2 at all.
> 

And debugging a coaxial network is a nightmare.  I remember crawling around
the office on all 4s, disconnecting each machine in turn and
unsplitting/resplitting
the cable ... With 10baseT you just disconnect them at the hub.
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