IS-IS Concepts and Operation JN0-664 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is a key difference between broadcast and point-to-point IS-IS network types?

   • APoint-to-point networks use multicast hello packets.
   • BBroadcast networks support only Level 1 adjacencies.
   • CPoint-to-point networks use a designated router, while broadcast networks do not.
   • DBroadcast networks require a designated router, while point-to-point networks do not.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What does the overload bit in an IS-IS LSP indicate?

   • AThe router is the designated router for the area.
   • BThe router is congested and will drop all transit traffic.
   • CThe router has lost its link-state database and needs to resynchronize.
   • DThe router is not available for transit traffic, but its directly connected routes remain reachable.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   What is the primary purpose of the IS-IS protocol in a service provider network?

   • ATo distribute MAC addresses across a switched network.
   • BTo build a link-state database and compute the shortest path to each destination within the routing domain.
   • CTo establish and maintain VPN tunnels between provider edge routers.
   • DTo exchange routing information between autonomous systems using path attributes.
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which adjacency state indicates that an IS-IS router has received a hello from a neighbor but the neighbor has not yet confirmed the adjacency?

   • AEstablished
   • BDown
   • CInit
   • DUp
   Reveal Solution Discussion Select an answer first
6. 10expert · hard

   A service provider is troubleshooting an IS-IS adjacency issue between two routers connected via a point-to-point link. The adjacency is flapping, and the 'show isis adjacency' output shows the neighbor in an 'Init' state. The engineer has verified that the hello interval and multiplier match on both routers. What should the engineer check next?

   • AVerify that the interface MTU is set to at least 1500 bytes on both routers.
   • BVerify that the circuit type is set to Level 2 on both routers.
   • CVerify that the DIS priority is set to the same value on both routers.
   • DVerify that the authentication settings match on both routers.
   Reveal Solution Discussion Select an answer first