Network Center shows up as a system tray icon. Single-click that icon and an Explorer window opens that's loosely akin to Windows XP Service Pack 2's Wireless Networking Wizard, but with a larger purview. Network Center offers a long list of tools and options for configuring and working with wired and wireless networks, including Network Map, which is designed to show all the nodes on your network, including the switches and access points. There's a Diagnose facility that ostensibly will help you figure out network problems.
(So far Microsoft has provided very limited information about new features showing up for the first time in the CTP builds. One thing the company has said is that Network Center will provide network diagnostics and make it easier to attach and configure network media players, routers, and wireless access points.)
Now networking in XP is brilliant, and i am sure most will agree that if they can further that development, then MS have done extremely well in this respect.
I got a picture of the Network center here for ya also












