Areas and Levels JN0-664 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is the purpose of route leaking from Level 2 to Level 1 in IS-IS?

   • ATo reduce the size of the Level 1 link-state database.
   • BTo prevent Level 1 routers from forming adjacencies with Level 2 routers.
   • CTo allow Level 1 routers to choose optimal paths to destinations outside their area.
   • DTo allow Level 2 routers to learn about Level 1 routes.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which statement correctly describes the effect of route leaking on Level 1 routing?

   • AIt causes Level 1 routers to become Level 2 routers.
   • BIt replaces the default route with specific routes to destinations in other areas.
   • CIt prevents Level 1 routers from sending traffic to Level 1/Level 2 routers.
   • DIt removes all default routes from Level 1 routers.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   What is the primary role of a Level 2 IS-IS router?

   • ATo form adjacencies only with Level 1 routers.
   • BTo maintain a separate routing table for each area.
   • CTo route traffic between areas and form the IS-IS backbone.
   • DTo route traffic within a single area.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   How does an IS-IS router use the results of its Level 1 and Level 2 SPF calculations?

   • AIt only uses the Level 2 SPF results for all routing decisions.
   • BIt discards the Level 1 SPF results if Level 2 results are available.
   • CIt merges the results into a single routing table.
   • DIt uses the Level 1 SPF results for intra-area routes and the Level 2 SPF results for inter-area routes.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   Why is a continuous Level 2 backbone important in IS-IS?

   • AIt allows Level 1 routers to form adjacencies with routers in other areas.
   • BIt ensures that Level 1 areas can communicate with each other.
   • CIt reduces the number of Level 1 routers required.
   • DIt eliminates the need for route leaking.
   Reveal Solution Discussion Select an answer first