How is Windows NT Load Balancing Service different from other clustering and load balancing solutions that I have heard about?
Windows NT Load Balancing Service scales the performance of TCP/IP services, such as a Web, proxy, or FTP servers, in addition to ensuring their high availability. Other clustering solutions improve fault-tolerance but do not scale the performance of individual applications. However, they complement Windows NT Load Balancing Services capabilities by making back-end database servers highly available. Most other load balancing solutions introduce single points of failure or performance bottlenecks and cost significantly more. For additional information on how WLBS compares to other TCP/IP load balancing solutions, please see the competitive matrix.