In this course, you'll learn about summarization, including how it can reduce the size of routing tables, the overhead of table searches, and the size of convergence domains. Then, you'll move on to look at policy-based routing and how it can be used to override the default behavior of a device. Next, you'll explore VRF-lite and its uses in smaller enterprises. You'll learn about Bidirectional Forwarding Detection and how it can help ensure your networks converge efficiently. Finally, you'll learn the prerequisites for the proper implementation of BFD. This course is one of a series that prepares you for the 300-410: Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) certification exam.