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？（）

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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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• 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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• Rate your level of proficiency with creating and managing users, computers, and groups in an ActiveDirectory environment, including troubleshooting computer accounts, user accounts, and userauthentication issues. （）

  A . Very High B . High C . Moderate D . Low E . Very Low

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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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• Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme？（）

  A . statically map IPV4 address to IPV6 addresses B . configuration IPv4 tunnels between IPV6 islands C . use DHCPv6 to map IPV4 addresses to IPV6 addresses D . use proxying and translation to translate IPV6 packets into IPV4 packets E . configure IPV6 directly F . enable dual-stack routing

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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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• Which of the following entries should be added to the syslog.conf file to capture information to troubleshoot a problem reported with e-mail? （）

  A .  smpt.info /tmp/syslog.msgs  B .  mail.debug /tmp/syslog.msgs  C .  daemon.err /tmp/syslog.msgs D .  mail.err /tmp/syslog.msgs&e

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• Rate your level of proficiency with creating and managing users, computers, and groups in an ActiveDirectory environment, including troubleshooting computer accounts, user accounts, and user authentication issues. （）

  A . I am considered an expert on this. I have successfully done this multiple times without assistance or error. I train or supervise others on this activity. Others come to me when they have questions or need assistance with this. B . I have successfully done this without assistance and with few errors, but I do not train or supervise others on this activity. C . I am proficient at this. I have successfully done this on my own, but I occasionally require assistance for some types of problems encountered when doing this and/or occasionally make minor errors. D . I have successfully done this with the assistance of others or specific instructions. E . I am a novice. I have not done this yet or I am learning.

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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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• 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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• 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 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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• Which of the following IOS commands could you use to troubleshoot a router connectivity problem on an IP network?（）

  A . show ip route B . ipconfig C . tracert D . show interfaces E . traceroute F . ping G . All of the above

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• In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）

  A . Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch. B . A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails. C . A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful. D . A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

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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 routing problem on the company EIGRP network you discover that one ofthe routers is failing to establish adjacencies with its neighbor. What is a likely cause of thisproblem between neighbors？（）

  A . The K-values do not match B . The hold times do not match C . The hello times do not match D . The AS numbers do not match

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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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• 语句while(E);中的表达式E等价于E!=0 。

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• Sandre came across an important letter yesterday while cleaning the desk.

  A．mentioned B．read C．discovered D．walked away with

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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

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