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EIGRP is being used as the routing protocol on the company network. While troubleshooting somenetwork connectivity issues， you notice a large number of EIGRP SIA （Stuck in Active） messages.What causes these SIA routes？（）
A . The neighboring router stops receiving ACK packets from this router
B . The neighboring router starts receiving route updates from this router
C . The neighboring router is too busy to answer the query （generally caused by high CPUutilization）
D . The neighboring router is having memory problems and cannot allocate the memory to processthe query or build the reply packet
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You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standaloneWLAN. What may have caused this problem？（）
A . The minimum data rate is not set to 11 Mbps.
B . An address resolution protocol has been disabled.
C . Publicly Secure Packet forwarding is enabled.
D . The access point is set to the least congested channel.
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While troubleshooting some connectivity issues，you issue the “show ip ospf database”in order to ex amine the link state database. Which three of the statements below are true regarding the OSPF link state database（）
A . Each router has an identical link state database.
B . External routes are imported into a separate link state database.
C . Syn chronization of link state databases is maintained via floodingo f LSAs.
D . Information in the link state database is used to build a routing table by calculating a shortest-path tree.
E . By default,link state databases are refreshede very 10 minutes in the absence of topology changes.
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While attempting to load a base operating system to a machine， an administrator is receiving bootp timeout error messages. What steps should be followed to troubleshoot communications between the NIM master and the client machine？（）
A . View debug logs on NIM master for errors or failures.
B . Boot the client machine to SMS， and view the POST Error log.
C . Boot the client machine to SMS， setup remote IPL， and execute a ping test.
D . Boot the client machine to diagnostics， and ping the client from the NIM master.
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While troubleshooting a network， you need to verify the liveness of hosts in the subnet 192.168.1.64/26. All of the hosts are able to reply to ping requests. How would you confirm the existing nodes using one single command？（）
A . ping 192.168.1.255
B . ping with sweep option
C . ping 192.168.1.127
D . ping 192.168.1.64
E . ping with broadcast optio
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While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate（）。
A . The port is experiencing errors
B . The port is administratively disabled
C . The port is blocked by spanning tree
D . The port has an active link with normal traffic activity
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While troubleshooting an EIGRP routing problem you notice that one of the company routers havegenerated a large number of SIA messages. What are two possible causes for EIGRP Stuck-In-Active routes？（）
A . Some query or reply packets are lost between the routers
B . The neighboring router starts receiving route updates from this router
C . A failure causes traffic on a link between two neighboring routers to flow in only one direction（unidirectional link）
D . The neighboring router stops receiving ACK packets from this router
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When troubleshooting a network， the output of the command show interfaces indicates a large number of runts. What is a runt？（）
A . the number of packets that are discarded because they exceed the maximum packet size of the medium
B . errors created when the CRC generated by the originating LAN station or far-end device does not match the checksum calculated from the data received.
C . the number of packets that are discarded because they are smaller than the minimum packet size of the medium
D . the number of received packets that were ignored by the interface because the interface hardware ran low on internal buffers
E . the number of times that the interface requested another interface within the router to slow dow
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As an experienced network administrator, you are asked to troubleshoot a QoS problem. In which way might the Cisco NetFlow be helpful during the troubleshooting process?（）
A . NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements.
B . NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic.
C . NetFlow can be configured to identify voice and video traffic flows and place them into a low-latency queue for expedited processing.
D . NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.
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Which Cisco IOS command is used to troubleshoot a problem in which a BGP session stays in the active state?（）
A . debug ip bgp updates
B . debug ip tcp events
C . debug ip bgp transactions
D . debug ip tcp transactio
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While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate?（）
A . The port is experiencing errors.
B . The port is administratively disabled.
C . The port is blocked by spanning tree.
D . The port has an active link with normal traffic activity.
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Which of the following is not a typical wireless troubleshooting target？（）
A . Quality of Service
B . Trunk configuration
C . Access lists
D . Routing protocol configuration
E . Power over Ethernet
F . DHCP configuratio
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Which of the following statements regarding documentation would not be considered a helpful stepin the troubleshooting process？（）
A . Use the Cisco Auto Configuration tool
B . Use the Cisco Rollback feature
C . Automate documentation
D . Schedule documentation checks
E . Use the Cisco Configuration Archive tool
F . Require documentation prior to a ticket being closed out
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The securing of passenger cars on a Ro-Ro vessel requires（）.
A . simple and lightweight equipment
B . low labor intensive equipment
C . specially designed equipment to avoid vehicle damage
D . All of the above
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While troubleshooting some connectivity issues， you issue the "show ip ospf database" in order toexamine the link state database. Which three of the statements below are true regarding theOSPF link state database？（）
A . Each router has an identical link state database
B . External routes are imported into a separate link state database
C . Synchronization of link state databases is maintained via flooding of LSAs
D . Information in the link state database is used to build a routing table by calculating a shortest-path tree
E . By default， link state databases are refreshed every 10 minutes in the absence of topologychange
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Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
A . procedures for accepting cargo securing devices
B . procedures for maintaining and repairing cargo-securing devices
C . record of cargo securing device inspections
D . All of the above
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Which of the following troubleshooting targets is considered to be a Layer 2 issue？（Choose allthat apply.）（）
A . Spanning Tree Protocol
B . Cabling
C . Frame forwarding
D . Packet forwarding
E . EtherChannel
F . Routing protocol
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While troubleshooting an EIGRP routing problem you notice that one of the routers have generated a large number of SIA messages. What are two possible causes for EIGRP Stuck - In -Active routes?（）
A . Some quer y or reply packets are lost between the routers.
B . The neighboring router starts receiving route updates from this router.
C . A failure causes traffic on a link between two neighboring routers to flow in only one direction(unidirectional link).
D . Th e neighboring router stops receiving ACK packets from this router.
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While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）
A . Router#copy tftp flash
B . Router(config)#restore flash
C . Router(config)#repair flash
D . Router#copy flash run
E . Router>copy start flash
F . Router#copy start flash
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假定（A)=85H,（RO)=20H,（20H)=AFH。执行指令:ADDA，@RO后，累加器A的内容为（)，CY的内容为（)，AC的内容为（)，OV的内容为（)。
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A network administrator is troubleshooting a redistribution of RIP routes into OSPF. Given the exhibited configuration commands, which statement is true？ （）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/3c57bf5472e55a54788da5d374cfa80b.jpg' />
A. Redistributed ro utes will be tagged as external type 1 (E1) with a metric of 30.
B. Redistributed routes will be tagged as external type 2 (E2) with a metric of 20.
C. Redistributed routes will maintain their original RIP routing metric.
D. Redistributed routes will ha ve a default metric of 0 and will be treated as unreachable and not advertised.
E. Redistributed routes will have a default metric of 0 but will not be treated as reachable and will be advertised.
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While troubleshooting a serial line problem, you enable ppp authentication debugging as shown below:Based on the command output above, what type of ‘handshake‘ was used for PPP authentication？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/8cfeff82ca82832de8d38de7ecc19da4.jpg' />
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/197d6a90c8ee401b7f6b0bd585a993d7.jpg' />
A. one-way
B. two-way
C. three-way
D. four-way
E. no handshakes required during authentication
F. None of the above
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While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."
At which OSI layer is this problem associated with？
A．The data link layer
B．The application layer
C．The access layer
D．The session layer
E．The network layer
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While troubleshooting connectivity issues, you log into a remote router. From there,you wish to see the layer 1 and layer 2 status of the interface.Which of the following IOS commands would you issue to check the current IP addressing, as well as theyer 1 and layer 2 status of an interface？（）
A. TK1 show version
B. TK1 show protocols
C. TK1 show interfaces
D. TK1 show controllers
E. TK1 show ip interface
F. TK1 show startup-config
