Frankly, this section of the exam is pretty basic. If you've worked with networks; or if you earned your MCSE, CNE, or even the Network+ certification, you're ahead of the game.
You'll need a basic understanding of how networks work, types of networks (client/server, mainframes, and Web-based networks). You will also need a grasp of network topologies (star, bus, token rings, yada-yada-yada). Expect simple questions about Windows NT/2000 and Novell Netware.
You will need some experience with protocols to pass this exam. Specifically, TCP/IP, IPX/SPX, NetBEUI, AppleTalk, DLC, and SNA. You'll also need to know about bindings, how to configure each protocol, and why a given protocol is needed in a given situation.
As expected, questions will deal with LANs and WANs, internetworking servers, and network security. Spend some time looking at IEEE LAN standards, cable and media types, bandwidth speeds, server roles, and how to secure servers on a network.
An in-depth look at TCP/IP is required. You'll need to know all about RFCs, Internet protocols, routing, address classes, IP addressing rules, subnet masks, and diagnostic tools for Internet troubleshooting.
A final objective is server-side scripting and database connectivity. You will need to know about server-side includes and the consequences they can have on clients and processor utilization. A grasp on database connectivity, CGI, and server programming is also required.