The most reliable connection is to use 802.1x authentication - and the best authentication mechanism is, to my mind, EAP Tunneled Transport Layer Security. This is only really viable in a business environment, as you require RADIUS. And you can choose to use this in conjunction with WEP, or not.
For the most reliable wireless - choose this method without WEP.


For security - I would advise utilizing WPA2 Enterprise, though - but this isn't the most reliable type of connection - but it could be, depending on environmental factors, number of AP's etc.

http://www.lawtechguru.com/archives/2004/08/01_wireless_networking_best_practices_version_20.htm

These are all quotes from Experts Exchange. Certainly not from me. smile

Bert
Pediatrics
Brewer, Maine