Link-State Database JN0-364 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the effect of setting the overload bit in an IS-IS router's LSP?

   • AThe router is excluded from the SPF calculation, so other routers do not use it as a transit path.
   • BThe router's LSPs are not flooded to other routers.
   • CThe router's routes are removed from the routing table.
   • DThe router stops sending Hello PDUs to its neighbors.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   Two IS-IS routers are adjacent on a broadcast network. They have just exchanged CSNPs and are now sending PSNPs to each other. What is the purpose of these PSNPs?

   • ATo establish a new adjacency.
   • BTo set the overload bit on the neighbor.
   • CTo flood the entire LSP database to the neighbor.
   • DTo acknowledge receipt of LSPs and request any missing LSPs.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   What is the role of a Partial Sequence Number PDU (PSNP) in database synchronization?

   • ATo advertise the entire link-state database to a new neighbor.
   • BTo establish a new adjacency.
   • CTo update the SPF tree.
   • DTo request missing LSPs and acknowledge received LSPs.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   What is the primary purpose of the link-state database in an IS-IS router?

   • ATo store the complete topology of the area, including all routers and their links, so that SPF can compute the shortest paths.
   • BTo store only the directly connected neighbors and their link metrics for fast convergence.
   • CTo maintain a list of all IP routes learned from external routing protocols such as BGP.
   • DTo cache the results of the last SPF calculation to avoid recomputation.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   Two IS-IS routers have just formed an adjacency on a point-to-point link. The routers exchange complete sequence number PDUs (CSNPs) and then each sends a partial sequence number PDU (PSNP) to request specific LSPs. What is the purpose of the PSNP in this scenario?

   • ATo set the overload bit on the receiving router.
   • BTo flood the local LSP database to the neighbor.
   • CTo request LSPs that are missing from the local database after comparing CSNPs.
   • DTo acknowledge receipt of all LSPs listed in the CSNP.
   Reveal Solution Discussion Select an answer first