Objects are reusable components for use in configurations. Objects can be defined and used in Cisco ASA configurations in the place of inline IP addresses, services, names, and so on. Objects make it easy to maintain configurations because an object can be modified in one place and the change will be reflected in all other places that are referencing it. Without objects, the parameters for every feature would need to be modified instead of just once. For example, if a network object defines an IP address and subnet mask, and you want to change the address, you only need to change it in the object definition, not in every feature that refers to that IP address. The advantage is that when an object is modified, the change is automatically applied to all rules that use the specified object. Therefore, objects make it easy to maintain configurations.
