Don,
First of all, you don't mention what OS those 4 computers are running...was
there an inference there about XP?
Second of all, BNC and "thin coax" aren't exactly state-of-the-art
technology. I don't think that they're true Ethernet, though my A+ days are
spotty in my brain...wait, this just in, BNC is 10 Base 2 Ethernet, which
one doesn't really hear much about these days...
http://searchnetworking.techtarget.c...211681,00.html
Thirdly, the network schema that you describe...A-------B-------C-------D is
known as a Bus Network, something else not commonly seen these days. The
big disadvantage to a Bus Network is that if one of the links (cable,
connector, card, etc.), on any one of those nodes, you've got a lot of
troubleshooting to do to figure out what went wrong. And, when mixing these
older, and newer technologies, there's a lot that can go wrong.
If you're a hobbyist who has lots of time on his hands, go for it, research
this to the bone, if you figure it out, I'd be interested in knowing. You
seem like someone who appreciates a challenge.
HowEVER, if time is of the essence, and you need to have a stable, efficient
network, start out with 100MBS capable network cards and Cat5 cabling, it
will probably be much easier.
Also, having a wireless router (Linksys makes great products, and offers
great tech support via phone, even if their accents aren't so common) will
make life a lot easier for you also.
Best Wishes,
smackedass