Jeff Duntemann's surprisingly readable book (see
www.duntemann.com/wifi)
should answer all your questions.
You can protect yourself against all but the most patient ('scuse the pun)
and knowledgeable hackers by enabling plain old WEP, as it'll be far too
much trouble to hack it for anyone else - you have to record a great deal of
traffic to pick up what's needed. WPA is more secure still.
You could simply run a peer-to-peer ("ad hoc") link between two machines
using the cheap-as-chips USB set from Actiontech (on offer for around £50
from dabs.com). However, one or more Access Points on your network will be
more scalable. You may not need the router component if you're happy for
all the connected machines to be on the same subnet (can't think any reason
why not, unless your surgery's huge).
If you're not that sure what you're doing, get someone in to check it all
for you, or you'll end up in the tabloids...
--
######################
## PH, London ##
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Cool As Blu wrote:
> Instead of spending vast amounts of money and time adding new wiring,
> I want to try and add a a new computer to our surgery's network via a
> wireless protocol. I have a wireless network at home via a cable
> modem, Belkin Wireless Router and a Wireless PC Card on my laptop. Do
> I just need to add a Wireless Router to the server at work or can I
> add an access point to the nearest wired PC ?
>
> Bear in mind the surgery network is connected to a secure NHS
> intranet, which is our gateway to the internet.
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