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.

In an OSPF network, when are DR and BDR elections required?

When the routers are interconnected over a common Ethernet network

When all the routers in an OSPF area cannot form adjacencies

When the two adjacent neighbors are in two different networks

When the two adjacent neighbors are interconnected over a point-topoint link

What are the advantages of using multiarea OSPF? (Choose two.)

It improves routing efficiency by reducing the routing table and linkstate update overhead.

Topology changes in one area do not cause SPF recalculations in other areas.

It allows OSPFv2 and OSPFv3 to run together.

It enables multiple routing protocols to run in a large network.

It improves routing performance by dividing the neighbor table into separate smaller ones.

What are the purposes of an OSPF router ID? (Choose two.)

To facilitate router participation in the election of the designated router

To uniquely identify the router within the OSPF domain

To enable the SPF algorithm to determine the lowest-cost path to remote networks

To facilitate the establishment of network convergence

To facilitate the transition of the OSPF neighbor state to Full

What are two reasons for creating an OSPF network with multiple areas? (Choose two.)

to reduce use of memory and processor resources

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

What does an OSPF area contain?

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

routers that share the same process ID

routers that share the same router ID

routers whose SPF trees are identical

What function is performed by the OSPF designated router?

summarizing routes between areas

maintaining the link-state database

redistribution of external routes into OSPF

What happens immediately after two OSPF routers have exchanged hello packets and have formed a neighbor adjacency?

They exchange abbreviated lists of their LSDBs.

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 request more information about their databases.

What is a feature of the OSPF routing protocol?

It scales well in both small and large networks.

OSPF authentication is configured in the same way on IPv4 and IPv6 networks.

Routers can be grouped into autonomous systems to support a hierarchical system.

The SPF algorithm chooses the best path based on 30-second updates.

What is a function of OSPF hello packets?

to discover neighbors and build adjacencies between them

to ensure database synchronization between routers

to send specifically requested link-state records

to request specific link-state records from neighbor routers

Which of the following facilitates hierarchical routing in OSPF?

3. The election of designated routers

Which statement describes a multiarea OSPF network?

It has a core backbone area with other areas connected to the backbone area.

It consists of multiple network areas that are daisy-chained together.

It has multiple routers that run multiple routing protocols simultaneously, and each protocol consists of an area.

It requires a three-layer hierarchical network design approach.

Which statement is correct about multiarea OSPF?

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

OSPF can consolidate a fragmented OSPF area into one large area.

All routers are in one area called the backbone area (area 0).

OSPF multiarea increases the frequency of SPF calculation.

Which statements describe features of the OSPF topology table? (Choose three.)

The table can be viewed via the show ip ospf database command.

It is a link-state database that represents the network topology.

When converged, all routers in an area have identical topology tables.

The topology table contains feasible successor routes.

Its contents are the result of running the SPF algorithm.

Which step does an OSPF-enabled router take immediately after the OSPF router builds the topology table?

Establishes an adjacency with another router

Exchanges link-state advertisements

Module 1

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following OSPF packets contains an abbreviated list of the LSDB of the sending router?

Type 1: Hello packet

Type 2: DBD packet

Type 3: LSR packet

Type 4: LSU packet

Type 5: LSAck packet

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following OSPF packets is used by routers to announce new information?

Type 1: Hello packet

Type 2: DBD packet

Type 3: LSR packet

Type 4: LSU packet

Type 5: LSAck packet

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Module 1

Which of the following OSPF components is associated with the neighbor table?

Which of the following OSPF components is responsible for computing the cost of each route?

Which of the following OSPF components is associated with the topology table?

Which of the following OSPF components is associated with the routing table?

What is the correct order in the steps for Link-State operation?

Which of the following OSPF packets contains an abbreviated list of the LSDB of the sending router?

Which of the following OSPF packets is used by routers to announce new information?

Which of the following OSPF packets is used by routers to request more information?

Which of the following OSPF packets is responsible for establishing and maintaining adjacency with other OSPF routers?

Which of the following OSPF packets is used to confirm receipt of an LSA?

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