Windows 2000 Advanced Server provides two clustering models: Network Load Balancing clusters (formerly known as the Windows Load Balancing Service) and server clusters. Clusters provide a highly available and scalable environment. Network Load Balancing clusters use standard hardware to distribute TCP/IP applications across a cluster. Server clusters use specialized shared disk resources to provide failover and static load balancing for a variety of applications. The next chapter covers configuring your storage as well as planning for fault tolerance and flexibility in managing your storage needs.