Quiz

Question 1

Which of the following statements about OSPF are not true? (select two).

1. In multi-area OSPF networks, all non-backbone areas must have an ABR connected to area 0.

2. Single-area OSPF must use area 0.

3. Two OSPF routers with different process IDs can become OSPF neighbors.

4. The OSPF area must be specified in the network command.

5. An ASBR connects the internal OSPF network outside of the OSPF domain.

6. The OSPF process ID must match the area number.

Solution

1. Single-area OSPF must use area 0.

1. The OSPF process ID must match the area number.

Question 2

You want to activate OSPF on R1's G0/1 and G0/2 interfaces with a single command.

• G0/1 IP: 10.0.12.1/28

• G0/2 IP: 10.0.13.1/26

Which of the following commands should you use on R1?

1. R1(config-router)# network 10.0.12.0 0.0.0.255 area 0

2. R1(config-router)# network 10.0.12.0 0.0.0.255 area 0

3. R1(config-router)# network 10.0.12.0 0.0.1.255 area 0

4. R1(config-router)# network 10.0.8.0 0.0.3.255 area 0

Solution

1. R1(config-router)# network 10.0.12.0 0.0.1.255 area 0

Question 3

Answer the following questions about the OSPF network below:

1. How many backbone routers are there?

2. How many ABRs are there?

3. How many ASBRs are there?

Solution

1. 4

2. 3

3. 1

Question 4

Which of the following commands will make R1 an OSPF ASBR?

1. R1(config-router)# network 10.0.0.0 0.0.0.255 area 0 R1(config-router)# network 10.0.1.0 0.0.0.255 area 1

2. R1(config)# ip route 0.0.0.0 0.0.0.0 203.0.113.2 R1(config# router ospf 1 R1(config-router)# default-information originate

3. R1(config-router)# network 0.0.0.0 255.255.255.255 area 0

4. R1(config-router)# default-route originate

Solution

1. R1(config)# ip route 0.0.0.0 0.0.0.0 203.0.113.2 R1(config# router ospf 1 R1(config-router)# default-information originate

Question 5

Which command can be used to manually configure the OSPF router ID?

1. R1(config-router)# router-id 1.1.1.1

2. R1(config-router)# ospf router-id 1.1.1.1

3. R1(config)# interface loopback0 R1(config-if)# ip address 1.1.1.1 255.255.255.255

4. R1(config-router)# ospf router id 1.1.1.1

Solution

1. R1(config-router)# router-id 1.1.1.1

Question 6

Put the OSPF neighbor states in the correct order:

• 2-way

• Down

• Exstart

• Exchange

• Full

• Init

• Loading

Solution

1. Down

2. Init

3. 2-way

4. Exstart

5. Exchange

6. Loading

7. Full

Question 7

Which statement about OSPF's default cost is correct?

1. All interfaces have the same cost.

2. Ethernet and FastEthernet interfaces have the same cost.

3. FastEthernet, Gigabit Ethernet, and 10Gig Ethernet interfaces have the same cost.

4. Ethernet, FastEthernet, Gigabit Ethernet, and 10Gig Ethernet interfaces have the same cost.

Solution

1. FastEthernet, Gigabit Ethernet, and 10Gig Ethernet interfaces have the same cost.

Question 8

In which OSPF neighbor state is the Master and Slave roles decided?

1. Exstart

2. 2-way

3. Exchange

4. Loading

Solution

1. Exstart

Question 9

Which of these commands can be used to make FastEthernet interface have an OSPF cost of 100?

1. R1(config-router)# auto-cost reference bandwidth 100

2. R1(config-router)# auto-cost reference bandwidth 1000

3. R1(config-router)# auto-cost reference bandwidth 10000

4. R1(config-router)# auto-cost reference bandwidth 100000

Solution

1. R1(config-router)# auto-cost reference bandwidth 10000

Question 10

What are the default OSPF Hello / Dead timers on an Ethernet connection?

1. Hello: 2, Dead: 20

2. Hello: 10, Dead: 40

3. Hello: 30, Dead: 120

4. Hello: 60, Dead: 180

Solution

1. Hello: 10, Dead: 40

Question 11

Which option states a characteristic of the OSP point-to-point network type that is different than the OSPD broadcast network type?

1. DR/BDR elections are held.

2. DR/BDR elections are not held.

3. Neighbors are dynamically discovered.

4. Neighbors are not dynamically discovered.

Solution

1. DR/BDR elections are not held.

Question 12

There is an OSPF broadcast network with 5 connected routers. R1 is the DR on its G0/0 interface. How many FULL OSPF adjacencies does R1 have on the interface?

1. 1, with the BDR.

2. 2, with the DR and BDR.

3. 4, with all neighbors.

4. 5, with all routers connected to the segment.

Solution

1. 4, with all neighbors.

Question 13

Which of the following are requirements for routers to become OSPF neighbors? (select two)

1. Hello and Dead timers must match.

2. OSPF Process IDS must match.

3. OSPF Router IDs must match.

4. Interfaces must be in the same area.

5. Interfaces must be in different areas.

6. Interfaces must be in different sunets.

Solution

1. Hello and Dead timers must match.

1. Interfaces must be in the same area.

Question 14

Which of the following OSPF LSA types is generated only by the DR of a multi-access network, such as the broadcast network type?

1. Type 1

2. Type 2

3. Type 3

4. Type 5

Solution

1. Type 2

Question 15

R1 is connected to an OSPF Broadcast network on its G0/0 interface. R4 is the DR of the segment and R3 is the BDR. All routers on the segment have the default OSPF priority. You issue the ip ospf priority 100 command on R1's G0/0 to make it the DR. Which of the following statements are true about the network after you issue the command? (select two)

1. R1 is the DR

2. R1 is the BDR

3. R1 is still a DROther because its priority isn't high enough.

4. If you issue the clear ip ospf process command on R4, R1 will become the BDR.

5. If you issue the clear ip ospf process command on R4, R1 will become the DR

6. The DR and BDR of the network are unchanged.

Solution

1. If you issue the clear ip ospf process command on R4, R1 will become the BDR.

1. The DR and BDR of the network are unchanged.