Summary
This chapter has defined scalability and provided examples of Cisco IOS features that enable you to grow your network successfully. You learned, for example, that knowing where the router is located in the hierarchy and what the key needs are for a given layer make it easier for you to configure the router to meet the specific needs of the layer.

Recall that the key characteristics of a scalable network are reliability and availability, responsiveness, efficiency, adaptability, and being accessible but secure. You will see these same concepts discussed again and again as you make your way through this semester.