Cisco Systems, Inc. is the leading global supplier of internetworking solutions, including routers, LAN and ATM switches, dial-up access servers, and network management software. The core of this book is a collaboration of multiple authors and experts over time to develop the definitive courses in Cisco WAN switch fundamentals and installation. Ronald W. McCarty, Jr., is a Senior Systems Engineer for one of the largest developers and manufacturers of communication equipment. His current responsibilities include presale design and support of carrier class access network products and network system management. Prior to his current position. Ronald supported global networks for a global supplier of call center support services. Earlier positions included edge and Internet services at an ISP in Freiburg, Germany and an internal network administration with the University where he received his degree. He received his bachelor’s degree in Computer Information Systems from the University of Maryland’s international campus at Schwaebisch Gmuend, Germany. Ronald has published articles on the RADIUS protocol, packet filtering with Cisco routers, IP Security, and intrusion detection, and currently has a monthly networking column with a system administration magazine.