Designated Intermediate System Operation JN0-664 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A network administrator is monitoring a broadcast segment and notices that the DIS has failed. What is the immediate impact on the other routers on the segment?

   • AThey continue to use the pseudonode LSP until a new DIS is elected.
   • BThey wait for the hold time to expire before electing a new DIS.
   • CThey stop all IS-IS communication on the segment.
   • DThey immediately elect a new DIS based on priority and MAC address.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   How do other routers on an IS-IS broadcast network detect that the DIS has failed?

   • AThey receive a new LSP from the DIS indicating it is leaving
   • BThey stop receiving Hello PDUs from the DIS and wait for the hold time to expire
   • CThey receive a failure notification from the DIS
   • DThey detect a change in the pseudonode LSP
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   In the IS-IS DIS election process on a broadcast segment, what is the role of the priority value carried in Hello PDUs?

   • AIt sets the hold time for adjacencies on the network
   • BIt determines the order in which routers send their LSPs
   • CIt is used to elect the DIS, with the highest priority winning
   • DIt indicates the router's willingness to become a Level 2 router
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A network administrator is troubleshooting a broadcast segment where the DIS has failed. The routers have the following priorities: R1=100, R2=64, R3=100, R4=64. The MAC addresses are R1=00:11:22:33:44:55, R2=00:11:22:33:44:66, R3=00:11:22:33:44:77, R4=00:11:22:33:44:88. Which router will become the new DIS?

   • AR3, because it has the highest priority and the highest MAC address among the highest-priority routers.
   • BR2, because it has the lowest priority and is least likely to cause issues.
   • CR1, because it has the highest priority and the highest MAC address among the highest-priority routers.
   • DR4, because it has the highest MAC address.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A network administrator is troubleshooting LSP flooding on a broadcast segment. They notice that LSPs are not being flooded efficiently. What is the DIS's role in LSP flooding?

   • AThe DIS does not participate in LSP flooding.
   • BThe DIS floods LSPs to all routers on the segment and ensures database synchronization.
   • CThe DIS uses a separate multicast address for flooding.
   • DThe DIS only floods its own LSPs and does not forward other routers' LSPs.
   Reveal Solution Discussion Select an answer first