SPF Algorithm JN0-664 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   In IS-IS, what is the default metric value assigned to a link?

   • A100
   • B10
   • C0
   • D1
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which input does the SPF algorithm use to compute routes in IS-IS?

   • AThe routing table of the local router
   • BThe configuration file of the local router
   • CThe forwarding table of the local router
   • DThe link-state database (LSDB)
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A network engineer is considering enabling partial route computation (PRC) on an IS-IS router. In which scenario would PRC be most beneficial?

   • AWhen a prefix is added or removed without a topology change
   • BWhen a link goes down
   • CWhen a router's system ID changes
   • DWhen a new router is added to the network
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A router in an IS-IS network receives a new LSP that indicates a link failure. What is the immediate effect on the router's routing table?

   • AThe router floods the LSP to all neighbors and waits for a new LSP
   • BThe router runs SPF and updates the routing table based on the new topology
   • CThe router ignores the LSP until the next SPF timer
   • DThe router immediately removes all routes that used the failed link
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   An engineer is examining the IS-IS link-state database on a router. The router has received LSPs from all routers in the area. What is the next step the router performs to build its routing table?

   • AFlood the LSPs to all neighbors
   • BRun the SPF algorithm to compute the shortest path tree
   • CWait for the next SPF timer interval
   • DSend a CSNP to request missing LSPs
   Reveal Solution Discussion Select an answer first