1. Cisco 3 - OSPF Perrine. J Page 16/4/2016 Module 2 What state are the routers in an OSPF network in after the DR and BDR are elected 1.Exstart 2.Full 3.Loading 4.Exchange

2. Cisco 3 - OSPF Perrine. J Page 26/4/2016 Module 2 What state are the routers in an OSPF network in after the DR and BDR are elected 1.Exstart 2.Full 3.Loading 4.Exchange

3. Cisco 3 - OSPF Perrine. J Page 36/4/2016 Module 2 Why would a network administrator choose to enable MD5 authentication for OSPF exchanges? (Choose three.) 1.to prevent OSPF packets from being decoded by unauthorized individuals using packet sniffers 2.to reduce OSPF information exchange overhead 3.to assure that OSPF routing information takes priority over RIP or IGRP updates 4.to encrypt routing tables to prevent unauthorized viewing 5.to ensure that routing information comes from a valid source 6.to prevent routing information from being falsified

4. Cisco 3 - OSPF Perrine. J Page 46/4/2016 Module 2 Why would a network administrator choose to enable MD5 authentication for OSPF exchanges? (Choose three.) 1.to prevent OSPF packets from being decoded by unauthorized individuals using packet sniffers 2.to reduce OSPF information exchange overhead 3.to assure that OSPF routing information takes priority over RIP or IGRP updates 4.to encrypt routing tables to prevent unauthorized viewing 5.to ensure that routing information comes from a valid source 6.to prevent routing information from being falsified

5. Cisco 3 - OSPF Perrine. J Page 56/4/2016 Module 2 What OSPF packet type establishes and maintains neighbor adjacencies? 1.Link-state request 2.Link-state acknowledgement 3.Hello 4.Database description packet

6. Cisco 3 - OSPF Perrine. J Page 66/4/2016 Module 2 What OSPF packet type establishes and maintains neighbor adjacencies? 1.Link-state request 2.Link-state acknowledgement 3.Hello 4.Database description packet

7. Cisco 3 - OSPF Perrine. J Page 76/4/2016 Module 2 Because of security concerns, a network administrator wants to set up authentication between two routers. Which of the following commands will configure Router_A to trust Router_B with a clear text password of apollo? 1.Router_A(config-if)# ospf authentication-key apollo 2.Router_A(config-if)# ip authentication-key apollo 3.Router_A(config-if)# ip ospf authentication apollo 4.Router_A(config-if)# ip ospf authentication-key apollo

8. Cisco 3 - OSPF Perrine. J Page 86/4/2016 Module 2 Because of security concerns, a network administrator wants to set up authentication between two routers. Which of the following commands will configure Router_A to trust Router_B with a clear text password of apollo? 1.Router_A(config-if)# ospf authentication-key apollo 2.Router_A(config-if)# ip authentication-key apollo 3.Router_A(config-if)# ip ospf authentication apollo 4.Router_A(config-if)# ip ospf authentication-key apollo

9. Cisco 3 - OSPF Perrine. J Page 96/4/2016 Module 2 What multicast address represents all OSPF routers? 1.224.0.0.6 2.224.0.0.1 3.224.0.0.4 4.224.0.0.5

10. Cisco 3 - OSPF Perrine. J Page 106/4/2016 Module 2 What multicast address represents all OSPF routers? 1.224.0.0.6 2.224.0.0.1 3.224.0.0.4 4.224.0.0.5

11. Cisco 3 - OSPF Perrine. J Page 116/4/2016 Module 2 In which types of networks are OSPF DR elections necessary? (Choose two.) 1.point-to-point 2.point-to-multipoint 3.broadcast multiaccess 4.nonbroadcast multiaccess

12. Cisco 3 - OSPF Perrine. J Page 126/4/2016 Module 2 In which types of networks are OSPF DR elections necessary? (Choose two.) 1.point-to-point 2.point-to-multipoint 3.broadcast multiaccess 4.nonbroadcast multiaccess

13. Cisco 3 - OSPF Perrine. J Page 136/4/2016 Module 2 What is a common feature of NBMA networks? 1.Support for only two routers 2.Support for more than two routers 3.No election of DRs 4.Full support for broadcast and multicast packets

14. Cisco 3 - OSPF Perrine. J Page 146/4/2016 Module 2 What is a common feature of NBMA networks? 1.Support for only two routers 2.Support for more than two routers 3.No election of DRs 4.Full support for broadcast and multicast packets

15. Cisco 3 - OSPF Perrine. J Page 156/4/2016 Module 2 What information can be obtained from the output of the show ip ospf interface command? (Choose three.) 1.link-state age intervals 2.timer intervals 3.router ID number 4.link-state update intervals 5.neighbor adjacencies

16. Cisco 3 - OSPF Perrine. J Page 166/4/2016 Module 2 What information can be obtained from the output of the show ip ospf interface command? (Choose three.) 1.link-state age intervals 2.timer intervals 3.router ID number 4.link-state update intervals 5.neighbor adjacencies

17. Cisco 3 - OSPF Perrine. J Page 176/4/2016 Module 2 What command allows OSPF routers to exchange routing updates without multicasts? 1.ip ospf neighbor 2.ospf neighbor 3.Neighbor 4.ip neighbor

18. Cisco 3 - OSPF Perrine. J Page 186/4/2016 Module 2 What command allows OSPF routers to exchange routing updates without multicasts? 1.ip ospf neighbor 2.ospf neighbor 3.Neighbor 4.ip neighbor

19. Cisco 3 - OSPF Perrine. J Page 196/4/2016 Module 2 Which router is the root of an SPF tree? 1.border router 2.nearest neighboring router 3.local router 4.trunk router, as determined by the SPF algorithm

20. Cisco 3 - OSPF Perrine. J Page 206/4/2016 Module 2 Which router is the root of an SPF tree? 1.border router 2.nearest neighboring router 3.local router 4.trunk router, as determined by the SPF algorithm

21. Cisco 3 - OSPF Perrine. J Page 216/4/2016 Module 2 Assume each router’s running-configuration contains OSPF default configuration values and concurrently performs the two-way state process. Which router becomes the Backup Designated Router? 1.RTA 2.RTB 3.RTC 4.RTD switch 200.202.16.0/24 Backbone or transit area RTA RTB RTD.1.2.3.4 1.1.1.1 /322.2.2.2 /323.3.3.3 /324.4.4.4 /32 RTC

22. Cisco 3 - OSPF Perrine. J Page 226/4/2016 Module 2 switch 200.202.16.0/24 Backbone or transit area RTA RTB RTD.1.2.3.4 1.1.1.1 /322.2.2.2 /323.3.3.3 /324.4.4.4 /32 Assume each router’s running-configuration contains OSPF default configuration values and concurrently performs the two-way state process. Which router becomes the Backup Designated Router? 1.RTA 2.RTB 3.RTC 4.RTD RTC

23. Cisco 3 - OSPF Perrine. J Page 236/4/2016 Module 2 Which of the following are disadvantages of link-state routing? (Choose three.) 1.Link-state protocols require careful network design. 2.Link-state protocols are prone to routing loops. 3.Link-state hello updates can cause broadcast flooding. 4.Link-state protocols place significant demands on router processors and memory resources. 5.Link-state protocols require a knowledgeable network administrator. 6.Link-state protocols do not support Variable Length Subnet Masking

24. Cisco 3 - OSPF Perrine. J Page 246/4/2016 Module 2 Which of the following are disadvantages of link-state routing? (Choose three.) 1.Link-state protocols require careful network design. 2.Link-state protocols are prone to routing loops. 3.Link-state hello updates can cause broadcast flooding. 4.Link-state protocols place significant demands on router processors and memory resources. 5.Link-state protocols require a knowledgeable network administrator. 6.Link-state protocols do not support Variable Length Subnet Masking

25. Cisco 3 - OSPF Perrine. J Page 256/4/2016 Module 2 Assuming that the network has converged, which of the following is true regarding the link-state database held by each router that is in the same OSPF area. ? 1.The link-state database is stored in a designated router and is accessed by each router in the area as needed. 2.Each router in an OSPF area has a link-state database containing the same status information. 3.Each router has a different link-state database depending on its location within the network. 4.The link-state database in each router only contains information about adjacent routers and the status of their links

26. Cisco 3 - OSPF Perrine. J Page 266/4/2016 Module 2 Assuming that the network has converged, which of the following is true regarding the link-state database held by each router that is in the same OSPF area. ? 1.The link-state database is stored in a designated router and is accessed by each router in the area as needed. 2.Each router in an OSPF area has a link-state database containing the same status information. 3.Each router has a different link-state database depending on its location within the network. 4.The link-state database in each router only contains information about adjacent routers and the status of their links

27. Cisco 3 - OSPF Perrine. J Page 276/4/2016 Module 2 A network administrator has configured a default route on Router_A but it is not being shared with adjacent Router_B and the other routers in the OSPF area. Which command will save the administrator the time and trouble of configuring this default route on Router_B and all of the other routers in the OSPF area? 1.Router_A(config-router)# ospf redistribute default-route 2.Router_B(config-router)# ospf redistribute default-route 3.Router_A(config-router)# default-information originate 4.Router_B(config-router)# default-information originate 5.Router_A(config-router)# ip ospf update-default 6.Router_B(config-router)# ip ospf update-default

28. Cisco 3 - OSPF Perrine. J Page 286/4/2016 Module 2 A network administrator has configured a default route on Router_A but it is not being shared with adjacent Router_B and the other routers in the OSPF area. Which command will save the administrator the time and trouble of configuring this default route on Router_B and all of the other routers in the OSPF area? 1.Router_A(config-router)# ospf redistribute default-route 2.Router_B(config-router)# ospf redistribute default-route 3.Router_A(config-router)# default-information originate 4.Router_B(config-router)# default-information originate 5.Router_A(config-router)# ip ospf update-default 6.Router_B(config-router)# ip ospf update-default