关键词：ADC；虚拟；后端ADC
摘 要：Application delivery controllers (ADCs) have evolved from basic server load balancingfunctional units to fully integrate with cloud workflows and provisioning systems so that theyhelp users enable fast roll-out of new applications to a mobilized work force, improve end-user satisfaction, and reduce the time and cost of application deployment. In this article, theauthors define the ADC and explain its evolution and how it works, point out the challenges acloud environment poses for an ADC, introduce a real-world ADC cloud product they helpedto develop, and detail how their ADCaaS works in the IBM? SmartCloud? Enterprise and IBMPureSystems? environments.