Adjacencies and Neighbors JN0-364 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the effect of an authentication key mismatch on an IS-IS adjacency?

   • AThe adjacency will form, but it will be stuck in the Initializing state.
   • BThe hello PDUs are dropped, and the adjacency will not form.
   • CThe adjacency will form, but the holding time will be set to zero.
   • DThe adjacency will form, but LSPs will not be flooded.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   On a broadcast multi-access network, what is the role of the Designated Intermediate System (DIS)?

   • AIt is responsible for electing the next DIS if it fails.
   • BIt acts as a central point for flooding LSPs and sends CSNPs to synchronize the link-state database.
   • CIt is the only router on the segment that can establish adjacencies with other routers.
   • DIt is the only router that can send hello PDUs on the segment.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   In an IS-IS Hello (IIH) PDU, what does the 'circuit type' field indicate?

   • AThe level of adjacency the router is willing to establish on this interface (Level 1, Level 2, or Level 1-2)
   • BWhether the interface is a broadcast or point-to-point circuit
   • CThe maximum number of adjacencies that can be formed on this interface
   • DThe MTU size of the interface
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A network engineer is analyzing IS-IS hello packets on a point-to-point link. The engineer notices that the circuit type field in the IIH packets is set to Level 1 on one router and Level 2 on the other. What is the effect of this mismatch?

   • AThe routers will form a Level 2 adjacency only.
   • BThe routers will form a Level 1-2 adjacency.
   • CThe routers will not form an adjacency.
   • DThe routers will form a Level 1 adjacency only.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   What is the first step in the IS-IS adjacency establishment process on a point-to-point link?

   • AThe router performs a designated intermediate system (DIS) election to determine the adjacency type.
   • BThe router sends a Complete Sequence Numbers PDU (CSNP) to request the neighbor's link-state database.
   • CThe router sends an IS-IS Hello (IIH) PDU to the neighbor to initiate the adjacency.
   • DThe router sends a Link State PDU (LSP) to the neighbor to begin database synchronization.
   Reveal Solution Discussion Select an answer first