LSA Flooding JN0-664 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network engineer is configuring OSPF in a network with an NSSA. The engineer needs to ensure that external routes injected into the NSSA are propagated to the rest of the OSPF domain. Which LSA type is used by the ABR to advertise these external routes to the rest of the domain?

   • AType 4 LSA
   • BType 7 LSA
   • CType 5 LSA
   • DType 3 LSA
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What is the primary purpose of LSA flooding in OSPF?

   • ATo exchange routing information with other autonomous systems
   • BTo establish and maintain neighbor adjacencies with directly connected routers
   • CTo synchronize the link-state databases of all routers in an OSPF network
   • DTo elect the designated router and backup designated router on each segment
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A network engineer is troubleshooting an OSPF convergence issue. A router in Area 1 has just received a new Type 1 Router LSA from a neighbor. According to the OSPF flooding process, what is the immediate next step the router performs after validating the LSA and installing it in its link-state database?

   • AIt sends a Link-State Acknowledgment to the neighbor that sent the LSA and floods the LSA out all other interfaces.
   • BIt discards the LSA if it is newer than the copy in its database and does not flood it.
   • CIt runs the SPF algorithm immediately to recompute the routing table before flooding the LSA to other neighbors.
   • DIt floods the LSA out all interfaces, including the interface it was received on, to ensure all neighbors receive it.
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   How are LSAs propagated from one OSPF area to another?

   • AASBRs flood external LSAs directly into all areas
   • BThe backbone area floods LSAs to all routers in the network
   • CABRs summarize the area's LSAs and flood summary LSAs into other areas
   • DEvery router floods all LSAs it knows to every other router regardless of area
   Reveal Solution Discussion Select an answer first
6. 10expert · hard

   A service provider is designing an OSPF network with multiple remote sites connected to a central hub. The remote sites have low-bandwidth links and limited router CPU/memory resources. The network engineer wants to minimize LSA flooding and link-state database size on the remote site routers. The remote sites do not need to receive external routes, and they only need a default route to reach the corporate network. Which OSPF area type should be configured for the remote sites?

   • AStub area
   • BTotally stubby area
   • CNSSA
   • DNormal area
   Reveal Solution Discussion Select an answer first