No Slide TitleModule 2
What state are the routers in an OSPF network in after the DR and BDR are elected
Exstart
Full
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Exchange
Module 2
What state are the routers in an OSPF network in after the DR and BDR are elected
Exstart
Full
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Exchange
Module 2
Why would a network administrator choose to enable MD5 authentication for OSPF exchanges? (Choose three.)
to prevent OSPF packets from being decoded by unauthorized individuals using packet sniffers
to reduce OSPF information exchange overhead
to assure that OSPF routing information takes priority over RIP or IGRP updates
to encrypt routing tables to prevent unauthorized viewing
to ensure that routing information comes from a valid source
to prevent routing information from being falsified
Cisco 3 - OSPF
Module 2
Why would a network administrator choose to enable MD5 authentication for OSPF exchanges? (Choose three.)
to prevent OSPF packets from being decoded by unauthorized individuals using packet sniffers
to reduce OSPF information exchange overhead
to assure that OSPF routing information takes priority over RIP or IGRP updates
to encrypt routing tables to prevent unauthorized viewing
to ensure that routing information comes from a valid source
to prevent routing information from being falsified
Cisco 3 - OSPF
Link-state request
Link-state acknowledgement
Link-state request
Link-state acknowledgement
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?
Router_A(config-if)# ospf authentication-key apollo
Router_A(config-if)# ip authentication-key apollo
Cisco 3 - OSPF
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?
Router_A(config-if)# ospf authentication-key apollo
Router_A(config-if)# ip authentication-key apollo
Cisco 3 - OSPF
224.0.0.6
224.0.0.1
224.0.0.4
224.0.0.5
224.0.0.6
224.0.0.1
224.0.0.4
224.0.0.5
Module 2
In which types of networks are OSPF DR elections necessary? (Choose two.)
point-to-point
point-to-multipoint
Module 2
In which types of networks are OSPF DR elections necessary? (Choose two.)
point-to-point
point-to-multipoint
Support for only two routers
Support for more than two routers
No election of DRs
Cisco 3 - OSPF
Support for only two routers
Support for more than two routers
No election of DRs
Cisco 3 - OSPF
Module 2
What information can be obtained from the output of the show ip ospf interface command? (Choose three.)
link-state age intervals
Module 2
What information can be obtained from the output of the show ip ospf interface command? (Choose three.)
link-state age intervals
Module 2
What command allows OSPF routers to exchange routing updates without multicasts?
ip ospf neighbor
Module 2
What command allows OSPF routers to exchange routing updates without multicasts?
ip ospf neighbor
border router
Cisco 3 - OSPF
border router
Cisco 3 - OSPF
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?
RTA
RTB
RTC
RTD
switch
200.202.16.0/24
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?
RTA
RTB
RTC
RTD
RTC
Module 2
Which of the following are disadvantages of link-state routing? (Choose three.)
Link-state protocols require careful network design.
Link-state protocols are prone to routing loops.
Link-state hello updates can cause broadcast flooding.
Link-state protocols place significant demands on router processors and memory resources.
Link-state protocols require a knowledgeable network administrator.
Link-state protocols do not support Variable Length Subnet Masking
Cisco 3 - OSPF
Module 2
Which of the following are disadvantages of link-state routing? (Choose three.)
Link-state protocols require careful network design.
Link-state protocols are prone to routing loops.
Link-state hello updates can cause broadcast flooding.
Link-state protocols place significant demands on router processors and memory resources.
Link-state protocols require a knowledgeable network administrator.
Link-state protocols do not support Variable Length Subnet Masking
Cisco 3 - OSPF
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. ?
The link-state database is stored in a designated router and is accessed by each router in the area as needed.
Each router in an OSPF area has a link-state database containing the same status information.
Each router has a different link-state database depending on its location within the network.
The link-state database in each router only contains information about adjacent routers and the status of their links
Cisco 3 - OSPF
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. ?
The link-state database is stored in a designated router and is accessed by each router in the area as needed.
Each router in an OSPF area has a link-state database containing the same status information.
Each router has a different link-state database depending on its location within the network.
The link-state database in each router only contains information about adjacent routers and the status of their links
Cisco 3 - OSPF
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?
Router_A(config-router)# ospf redistribute default-route
Router_B(config-router)# ospf redistribute default-route
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?
Router_A(config-router)# ospf redistribute default-route
Router_B(config-router)# ospf redistribute default-route