Citrix NetScaler offers customers the flexibility of choosing the features and virtual or physical appliances that best suit their needs. Pay-As-You-Grow and Burst Pack options give customers the ultimate in investment protection by reducing initial investment and eliminating the need for rip and replace upgrades. With Citrix TriScale technology, scalability is dramatically enhanced with clustering license upgrades that enable up to 32 NetScaler appliances to act as one unified single imaged system.