The 642-874 ARCH aims to test your knowledge on the latest development in network design and technologies. Topics covered include:Design advanced enterprise campus networksDesign advanced IP addressing and routing solutions for enterprise networksDesign WAN services for enterprise networksDesign an enterprise data centerDesign security servicesYou need to know the technical stuff and also the conceptual models of network design. Network design is all about proper "division of labor" - you need to use the right gears to do the right things at the right place. You are seeing things from a broader planning perspective.