Karan Khanna, Microsoft's lead product manager for NT Server, explained that applications that run under NT 4.0 will run under Windows 2000 if they don't access the new features.

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Microsoft's MMC plug-ins - which are management applets that run inside the console - replace many of the old configuration and administration tools that currently ship with NT, such as the User Manager, Server Manager and Event Viewer.

CNN: How to prepare for Windows 2000

"Theoretically, capacity falls as it goes through more hops, " says Mark Whitton, general manager for wireless networks at Nortel Networks (nyse: NT - news - people ).

FORBES: Think You're Wireless? Think Again