CCNP Routing and Switching ROUTE 300-101 Official Cert Guide

Chapter 9

1. C. The output lists all of B1’s routes for subnets within the range 10.1.0.0–10.1.255.255 whose prefix lengths are longer than /16. One answer lists subnet 10.2.2.0/24, which is not in this range, so the output cannot be used to confirm or deny whether the subnet was filtered. B1’s route for 10.1.2.0/24 is an intra-area route by virtue of not listing an inter-area (IA) code by the route. Type 3 LSA filtering only filters Type 3 LSAs, which routers use to calculate interarea routes, so the output tells us nothing about any filtering of 10.1.2.0/24. The output shows a single interarea route for 10.1.3.0/24, so at least one ABR has flooded a Type 3 LSA for this route. Additionally, the output confirms that at least one ABR flooded ...