Computer Associates plans to update its network management software geared for medium-sized businesses. The new version of NetworkIT runs faster and features an improved graphical user interface, which gives administrators a visual network map to pinpoint problems. The software includes support for wireless networks and an add-on that lets administrators view how quickly applications are running on the network. The beta of NetworkIT version 2.0 is available now. The final version, which will cost about $15,000, will ship by year's end.