This chapter covered various aspects of OIS architecture. You learned about the lifecycle of a policy and what happens when a policy is started for both monitored policies and ad hoc policies. In addition, this chapter described how the various aspects of Action Server spillover and policy throttling behavior. It also provided a number of architectural models used for deploying OIS and the security models that might be used. In Chapter 4, "Installing Opalis Integration Server 6.3," you will learn all the steps necessary to install OIS and the OOC.