Every Cisco ASA device provides a very comprehensive feature set through a combination of basic capabilities and platform capacities to service any secure network. This chapter discussed license mechanisms for advanced security features that add additional layers of protection or accommodate more complex network designs. It also explained how to scale the Cisco ASA capabilities as your network grows by leveraging tiered capacity licenses for certain features. This chapter covered permanent and time-based activation keys that allow you to create and manage the appropriate feature set for any given Cisco ASA device. It provided an overview of how failover and clustering features enable aggregation of the licensed capacities to increase the efficiency of your investment. The final sections showed how you can group multiple ASA devices to service premium VPN sessions from a shared license pool.