Designated Intermediate System (DIS) JN0-364 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network engineer is troubleshooting a broadcast segment where the DIS has failed. The engineer wants to minimize the time it takes for a new DIS to be elected. What is the most effective action the engineer can take?

   • AConfigure a backup DIS on the segment to take over immediately.
   • BEnsure all routers on the segment have the same IS-IS priority.
   • CReduce the hello interval on the interfaces of all routers on the segment.
   • DIncrease the priority of the current DIS to prevent it from failing.
   Reveal Solution Discussion Select an answer first
2. 7expert · medium

   A network engineer is configuring a new broadcast segment with three routers. The engineer wants to ensure that Router A is the DIS. Router A has priority 100, Router B has priority 100, and Router C has priority 80. Router A's MAC address is 00:11:22:33:44:55, Router B's MAC address is 00:11:22:33:44:56, and Router C's MAC address is 00:11:22:33:44:57. What will happen during the DIS election?

   • ARouter B becomes the DIS because it has the same priority as Router A but a higher MAC address.
   • BRouter A becomes the DIS because it has the same priority as Router B but a lower MAC address.
   • CRouter C becomes the DIS because it has the lowest priority.
   • DNo DIS is elected because there is a tie in priority.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   On an IS-IS broadcast multi-access network, which two factors are used to elect the Designated Intermediate System (DIS)?

   • APriority and MAC address
   • BCost and system ID
   • CArea ID and priority
   • DSystem ID and circuit ID
   Reveal Solution Discussion Select an answer first
5. 9expert · medium

   A network engineer is troubleshooting an IS-IS broadcast segment. The current DIS has a priority of 64. The engineer wants to make a different router, Router X, the DIS. The engineer sets Router X's priority to 127. After waiting several minutes, Router X is still not the DIS. What is the most likely reason?

   • AThe current DIS has a higher system ID than Router X.
   • BIS-IS does not preempt the current DIS when a new router with a higher priority joins the segment.
   • CThe current DIS has a higher MAC address than Router X.
   • DRouter X's priority change has not been propagated to the other routers.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is a key difference between IS-IS DIS and OSPF's Designated Router (DR) and Backup Designated Router (BDR)?

   • AOSPF has no backup DR
   • BIS-IS DIS is elected based on router ID
   • COSPF DR is elected based on MAC address
   • DIS-IS has no backup DIS
   Reveal Solution Discussion Select an answer first