Areas and Levels JN0-664 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   Two IS-IS routers are connected via a point-to-point link. Router A is configured as Level 1 only, and Router B is configured as Level 1/Level 2. What adjacencies will be formed on this link?

   • ANo adjacency will be formed because the routers have different level configurations.
   • BBoth a Level 1 and a Level 2 adjacency will be formed.
   • CA Level 2 adjacency will be formed, but a Level 1 adjacency will not.
   • DA Level 1 adjacency will be formed, but a Level 2 adjacency will not.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   How does an IS-IS router determine its area membership?

   • ABy the router's hostname.
   • BBy the area address configured in its NET.
   • CBy the system ID configured in its NET.
   • DBy the IP address of its loopback interface.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which type of router is required to provide connectivity between two different IS-IS areas?

   • AA Level 2 router
   • BA Level 1/Level 2 router is the only type that can connect areas.
   • CAny router, regardless of level, can route between areas.
   • DA Level 1 router
   Reveal Solution Discussion Select an answer first
5. 19foundation · medium

   In an IS-IS network, a Level 1 router within area 49.0001 needs to forward a packet to a destination that is not in its Level 1 link-state database. Which statement correctly describes the router's behavior based on the contents of its link-state databases?

   • AThe router forwards the packet to the nearest Level 1/Level 2 router, which then uses its Level 2 database to route the packet toward the destination area.
   • BThe router drops the packet because it has no route to the destination in its Level 1 database.
   • CThe router floods a new Level 2 LSP to discover the destination, then installs a route from the resulting Level 2 database entry.
   • DThe router uses its Level 2 database to find the destination because it is a Level 1/Level 2 router by default.
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   You are designing an IS-IS network for a service provider with two major regions. Each region has multiple Level 1 areas. The regions are connected by a single high-speed link between two Level 2 routers. The design team is concerned about the resilience of the inter-region connection. Which design change would most improve the resilience of the Level 2 backbone?

   • AChange the Level 1 areas to Level 2 areas to simplify the network.
   • BConfigure route leaking from Level 2 to Level 1 in both regions.
   • CAdd a second high-speed link between the same two Level 2 routers.
   • DAdd a second Level 2 router in each region and connect them with a second inter-region link.
   Reveal Solution Discussion Select an answer first