Designated Intermediate System Operation JN0-664 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A network engineer is troubleshooting LSP flooding on a broadcast segment. The DIS has just been elected. What is the DIS's role in representing the broadcast network in the link-state database?

   • AThe DIS only forwards LSPs received from other routers without generating its own.
   • BThe DIS does not participate in flooding on the broadcast segment.
   • CThe DIS floods a separate LSP for each neighbor on the broadcast segment.
   • DThe DIS creates a pseudonode LSP that represents the broadcast network and lists all attached routers.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   How does the DIS optimize LSP flooding on an IS-IS broadcast network?

   • AIt floods LSPs only when a topology change occurs
   • BIt floods LSPs using unicast to each router to ensure reliability
   • CIt floods LSPs to all routers simultaneously using multicast
   • DIt floods LSPs only to routers that have requested them
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A new router is added to a broadcast segment that already has an established DIS. The new router has a higher priority than the current DIS. What will happen regarding the DIS election?

   • AThe current DIS remains the DIS until it fails or is reset.
   • BThe new router immediately becomes the DIS after sending its first Hello.
   • CThe two routers share DIS responsibilities.
   • DThe new router becomes the DIS after the hold time expires.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

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

   • ARouter ID and interface index
   • BCircuit ID and priority
   • CSystem ID and area address
   • DPriority and MAC address
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   What is the purpose of a pseudonode LSP in IS-IS on a broadcast network?

   • ATo list all routers in the area and their routing tables
   • BTo advertise the DIS's own IP address to all routers on the network
   • CTo provide a backup for the DIS in case it fails
   • DTo represent the broadcast network as a single node in the link-state database
   Reveal Solution Discussion Select an answer first