CIS 225 Unit 1(Single-Area OSPFv2 Concepts) Check Your Understandings & Quiz Mastercut

OSPF will remove that neighbor from the router link-state database.

A router is participating in an OSPFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OSPF router? OSPF will remove that neighbor from the router link-state database. A new dead interval timer of 4 times the hello interval will start. SPF will run and determine which neighbor router is "down". OSPF will run a new DR/BDR election.

Full

At which OSPF state are neighbor routers converged and able to exchange routing updates? Exchange Full Two-Way ExStart

60 seconds

The OSPF hello timer has been set to 15 seconds on a router in a point-to-point network. By default, what is the dead interval on this router? 60 seconds 45 seconds 15 seconds 30 seconds

to reduce use of memory and processor resources to reduce SPF calculations

What are two reasons for creating an OSPF network with multiple areas? (Choose two.) to reduce use of memory and processor resources to simplify configuration to reduce SPF calculations to ensure that an area is used to connect the network to the Internet to provide areas in the network for routers that are not running OSPF

routers that have the same link-state information in their LSDBs

What does an OSPF area contain? routers that share the same router ID routers whose SPF trees are identical routers that share the same process ID routers that have the same link-state information in their LSDBs

dissemination of LSAs

What function is performed by the OSPF designated router? redistribution of external routes into OSPF summarizing routes between areas dissemination of LSAs maintaining the link-state database

They exchange abbreviated lists of their LSDBs.

What happens immediately after two OSPF routers have exchanged hello packets and have formed a neighbor adjacency? They negotiate the election process if they are on a multiaccess network. They exchange DBD packets in order to advertise parameters such as hello and dead intervals. They exchange abbreviated lists of their LSDBs. They request more information about their databases.

It scales well in both small and large networks.

What is a feature of the OSPF routing protocol?​ Routers can be grouped into autonomous systems to support a hierarchical system. It scales well in both small and large networks. The SPF algorithm chooses the best path based on 30-second updates​. OSPF authentication is configured in the same way on IPv4 and IPv6 networks.​

to discover neighbors and build adjacencies between them

What is a function of OSPF hello packets? to ensure database synchronization between routers to send specifically requested link-state records to discover neighbors and build adjacencies between them to request specific link-state records from neighbor routers

link-state database

What is identical on all OSPF routers within a single area? routing table static routes link-state database neighbor table

1. Establish Neighbor Adjacencies 2. Exchange Link-State Advertisements 3. Build the Topology Table 4. Execute the SPF Algorithm 5. Choose the Best Route

What is the correct order in the steps for Link-State operation? 1. Execute the SPF Algorithm 2. Establish Neighbor Adjacencies 3. Exchange Link-State Advertisements 4. Choose the Best Route 5. Build the Topology Table 1. Establish Neighbor Adjacencies 2. Choose the Best Route 3. Build the Topology Table 4. Execute the SPF Algorithm 5. Exchange Link-State Advertisements 1. Establish Neighbor Adjacencies 2. Exchange Link-State Advertisements 3. Execute the SPF Algorithm 4. Choose the Best Route 5. Build the Topology Table 1. Establish Neighbor Adjacencies 2. Exchange Link-State Advertisements 3. Build the Topology Table 4. Execute the SPF Algorithm 5. Choose the Best Route

Hello, DBD, LSR, LSU, LSAck

What is the order of packet types used by an OSPF router to establish convergence? Hello, DBD, LSR, LSU, LSAck LSAck, Hello, DBD, LSU, LSR Hello, LSAck, LSU, LSR, DBD LSU, LSAck, Hello, DBD, LSR

adjacency database

What is used to create the OSPF neighbor table? forwarding database link-state database routing table adjacency database

LSU

Which OSPF packet contains the different types of link-state advertisements? DBD hello LSU LSR LSAck

Adjacency database

Which of the following OSPF components is associated with the neighbor table? Dijkstra's algorithm Link-State database Routing protocol messages Adjacency database Forwarding database

Forwarding database

Which of the following OSPF components is associated with the routing table? Dijkstra's algorithm Link-State database Routing protocol messages Adjacency database Forwarding database

Link-State database

Which of the following OSPF components is associated with the topology table? Dijkstra's algorithm Link-State database Routing protocol messages Adjacency database Forwarding database

Dijkstra's algorithm

Which of the following OSPF components is responsible for computing the cost of each route? Dijkstra's algorithm Link-State database Routing protocol messages Adjacency database Forwarding database

Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers.

Which statement is correct about multiarea OSPF? Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers. All routers are in one area called the backbone area (area 0). OSPF can consolidate a fragmented OSPF area into one large area. OSPF multiarea increases the frequency of SPF calculation.

It is a link-state database that represents the network topology. The table can be viewed via the show ip ospf database command. When converged, all routers in an area have identical topology tables.

Which three statements describe features of the OSPF topology table? (Choose three.) It is a link-state database that represents the network topology. After convergence, the table only contains the lowest cost route entries for all known networks. The table can be viewed via the show ip ospf database command. The topology table contains feasible successor routes. Its contents are the result of running the SPF algorithm. When converged, all routers in an area have identical topology tables.