A field effect transistor includes a drain region having a first portion and a second portion, with the second portion being more lightly doped than the first portion. The outer case has an inner brim portion on an inner end portion on a sealed fluid side. The management center then performs maintenance on the computer system when a fault condition is noticed. , is trained from sequential chunks of the data stream. A method for operating the network includes discovering and using routes in the network, predicting route failure in the network, and performing route maintenance in the network based upon the predicted route failure.