When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?（）

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• When implementing OSPFv3, which statement describes the configuration of OSPF areas?（）

  A . In interface configuration mode, the OSPFv3 area ID combination assigns interfaces to OSPFv3 areas. B . In router configuration mode, the network wildcard area ID combination assigns networks to OSPFv3 areas. C . In interface configuration mode, the IPv6 OSPF process area ID combination assigns interfaces to OSPFv3 areas. D . In router configuration mode, the IPv6 OSPF interface area ID combination assigns interfaces to OSPFv3 areas.

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• What OSPF command, when configured, will include all interfaces into area 0?（）

  A . network 0.0.0.0 255.255.255.255 area 0 B . network 0.0.0.0 0.0.0.0 area 0 C . network 255.255.255.255 0.0.0.0 area 0 D . network all-interfaces area 0

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• Which two design recommendations are most appropriate when OSPF is the data center core routing protocol? （）

  A . Never use passive interfaces. B . Use NSSA areas from the core down. C . Use totally stub areas to stop type 3 LSAs. D . Use the lowest Ethernet interface IP address as the router ID. E . Tune OSPF timers to enable OSPF to achieve quicker convergence.

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• Which two statements about route redistribution when implementing OSPF are true?（）

  A . Routes learned using any IP routing protocol can only be redistributed into non IP routing protocols. B . OSPF can import routes learned using EIGRP, RIP, and IS - IS. C . OSPF routes cannot be exported into EIGRP, RIP, an d IS - IS. D . At the interdomain level, OSPF cannot import routes learned using BGP. E . OSPF routes can be exported into BGP.

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• When you are troubleshooting an ACL issue on a router,which command can help you to verify which interfaces are affected by the ACL?（）

  A . show ip access-list B . show access-list C . list ip interface D . show interface E . show ip interface

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• When using the wlse to verify rf coverage，which task will use the configured radio settings？（）

  A . frame monitoring B . radio scan C . self-healing D . client walkabout

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• The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart，which mechanism is used tocontinue forwarding packets during a switchover？（）

  A . Reverse Path Forwarding B . Hardware-based forwarding C . UDP forwarding D . Layer 2 Forwarding

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• Refer to the exhibit. Which two Cisco IOS commands on R2 would verify its OSPF neighbor  relationships?（）https://assets.asklib.com/images/image2/2018073017210077293.jpg

  A . show ip ospf B . show ip ospf interface C . show ip ospf neighbor D . show ip ospf database E . show ip ospf statistics F . show running - config begin router ospf

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• When the Cisco IOS OSPF command ip ospf dead-interval minimal hello-multiplier 5 is configured， which two statements are true？ （）

  A . OSPF hello interval is 5 seconds B . OSPF hello interval is 1 second C . OSPF dead interval is 1 second D . OSPF dead interval is 5 seconds E . OSPF dead interval is 20 seconds F . OSPF hello interval is 0.2 second

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• When verifying the OSPF link state database, which type of LSAs should you expect to see within the different OS PF area types?（）

  A . All OSPF routers in stubby areas can have type 3 LSAs in their database. B . All OSPF routers in stubby areas can have type 7 LSAs in their database. C . All OSPF routers in totally stubby areas can have type 3 LSAs in their database. D . All OSPF routers in totally stubby areas can have type 7 LSAs in their database. E . All OSPF routers in NSSA areas can have type 3 LSAs in their database. F . All OSPF routers in NSSA areas can have type 7 LSAs in their database.

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• Which IOS commands can a network technician use to verify all RIP, IGRP,EIGRP, and OSPF routing protocol configurations?（）

  A . debug ip routing B . show running-config C . show ip route protocols D . show ip protocols E . show protocols al

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• The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart， which mechanism is used tocontinue forwarding packets during a switchover？（）

  A . Reverse Path Forwarding B . Hardware-based forwarding C . UDP forwarding D . Layer 2 Forwarding

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• Which two design recommendations are most appropriate when OSPF is the data center core routing protocol？ （）

  A .  Never use passive interfaces. B .  Use NSSA areas from the core down. C .  Use totally stub areas to stop type 3 LSAs. D .  Use the lowest Ethernet interface IP address as the router ID. E .  Tune OSPF timers to enable OSPF to achieve quicker convergence

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• When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?（）

  A . exstart state>exchange state>loading state>full state B . exstart state>full state>loading state>exchange state C . Loading state>exchange state>full state>exstart state D . exstart state>loading state>exchange state>full state

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• You are troubleshooting an OSPF problem where external routes are not showing up in the OSPF database. Which two options a re valid checks that should be performed first to verify proper OSPF operation?（）

  A . Are the ASBRs trying to redistribute the external routes into a totally stubby area? B . Are the ABRs configured with stubby areas? C . Is the subnets keyword being used with the redistribution command? D . Is backbone area (area 0) contiguous? E . Is the CPU utilization of the routers high?

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• How can an administrator verify that the disk is still usable when the output of ‘lspv’ shows‘hdisk1’ is in a missing state？（）

  A . lspv -l hdisk1 B . lscfg -l hdisk1 C . lsattr -l hdisk1 D . dd if=/dev/hdisk1 bs=512k count=10 of=/tmp/disk.txt

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• Which of the following OSPF commands, when used together, will put the network 192.168.10.0/24 into OSPF area 0?（）

  A . Router(config-router)# network 192.168.10.0 0.0.0.255 0 B . Router(config-router)# network 192.168.10.0 0.0.0.255 area 0 C . Router(config-router)# network 192.168.10.0 255.255.255.0 area 0 D . Router(config)# router ospf 0 E . Router(config)# router ospf 1

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• Your network has a mixture of Fast Ethernet and Gigabit Ethernet links. What needs t o be done to ensure optimal data routing when using OSPF?（）

  A . Nothing. OSPF will determine the most optimal path for routing data by default. B . Adjust the hello and dead timers for more rapid detection of link failures. C . Increase the reference - bandw idth used to calculate the interface default metrics, on all routers in your network. D . Set the priority values on every broadcast interface to ensure that the designated and backup designated routers are the routers with the most processor and memory resources.

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• What action should you be prepared to take when verifying a security solution？（）

  A . having alternative addressing and VLAN schemes B . having a rollback plan in case of unwanted or unexpected results C . running a test script against all possible security threats to insure that the solution will mitigate all potential threats D . isolating and testing each security domain individually to insure that the security design will meet overall requirements when placed into production as an entire system

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• Which command should you use to verify what networks are being routed by a given OSPF process（）

  A . show ip ospf B . show ip route C . show ip protocol D . show ip ospfdatabase E . None of the other alternatives apply

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• OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）

  A .  OSPF stub areas increase the size of the LSDB with the addition of Type 3 and 5 LSAs B .  OSPF not so stubby areas are particularly useful as a simpler form of summarization C .  OSPF stub areas are always insulated from external changes D .  OSPF totally stubby cannot distinguish among ABRs for the best route to destinationsoutsidethe areas E .  OSPF stub areas can distinguish among ASBRs for destinations that are external to the OSPFdomai

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• Which two features prevent routing loops between the OSPF sites of a customer when the sites aremultihomed or a backdoor link is used between the sites？ （）

  A . sham link B . down bit C . virtual link D . Site of Origin E . domain tag

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• Which RMAN command is used to verify the status of a backup or copy， and also updates the repository when files have been deleted using operating system commands？（）

  A . CHANGE B . RESYNC C . CATALOG D . CROSSCHECK

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• Refer to the exhibit. When running OSPF, What would cause router A not to form an adjacency with router B？（）

  <img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/67e52e69e1cc511a71a60a5d0c35c68a.jpg' /> A.The loopback addresses are on different subnets B.The value of the dead timers on the router are different C.Route summarization is enabled on both routers D.The process indentifier on router A is different than the process identifier on router B

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