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单选题
While troubleshooting a network connectivity issue, you suspect that a router may be missing a route, or may be receiving bad routing information to a destination. What command should you issue to view the route that the router will use to reach a given destination?（）
A
ping
B
trace
C
show ip route
D
show interface
E
show cdp neighbors
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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 layerB．The application layerC．The access layerD．The session layerE．The network layer
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A technician is troubleshooting a network connectivity issue. Given the following abbreviated traceroute output:Which of the following is MOST likely occurring?()
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考题
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 versionB. TK1# show protocolsC. TK1# show interfacesD. TK1# show controllersE. TK1# show ip interfaceF. TK1# show startup-config
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A technician is troubleshooting a network connectivity issue on a MFD and would like to eliminate the possibility of another device on the network having the same IP address. The technician should：（）A、disconnect the MFD and ping the IP address.B、disconnect the MFD and ping the subnet mask.C、disconnect the MFD and ping the loopback address.D、run the ipconfig command from the command prompt.
考题
While troubleshooting a connectivity issue from a PC you obtain the following information: Local PC IP address: 10.0.0.35/24 Default Gateway: 10.0.0.1 Remote Sever: 10.5.75.250/24 You then conduct the following tests from the local PC: Ping 127.0.0.1 – Successful Ping 10.0.0.35 – Successful Ping 10.0.0.1 – Unsuccessful Ping 10.5.75.250 – Unsuccessful What is the underlying cause of this problem?（）A、A remote physical layer problem exists.B、The host NIC is not functioning.C、TCP/IP has not been correctly installed on the host.D、A local physical layer problem exists.
考题
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 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 errorsB、The port is administratively disabledC、The port is blocked by spanning treeD、The port has an active link with normal traffic activity
考题
While you are troubleshooting network performance issues， you notice that a switch is periodically flooding all unicast traffic. Further investigation reveals that periodically the switch is also having spikes in CPU utilization， causing the MAC address table to be flushed and relearned. What is the most likely cause of this issue？（）A、a routing protocol that is flooding updatesB、a flapping port that is generating BPDUs with the TCN bit setC、STP is not running on the switchD、a user that is downloading the output of the show-tech commandE、a corrupted switch CAM table
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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 routerB、The neighboring router starts receiving route updates from this routerC、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
考题
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 layerB、The application layerC、The access layerD、The session layerE、The network layer
考题
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 versionB、TK1# show protocolsC、TK1# show interfacesD、TK1# show controllersE、TK1# show ip interfaceF、TK1# show startup-config
考题
While troubleshooting a network connectivity issue, you suspect that a router may be missing a route, or may be receiving bad routing information to a destination. What command should you issue to view the route that the router will use to reach a given destination?（）A、pingB、traceC、show ip routeD、show interfaceE、show cdp neighbors
考题
A network technician is troubleshooting a network issue that has just been reported. Which of thefollowing troubleshooting steps should the technician take FIRST to help resolve this issue?（）A、Record the solution in the appropriate logs for future use.B、Ask the user who reported the issue what past documentation they have.C、Ask the user who reported the issue to explain the symptoms in detail.D、Record what steps should be taken to resolve the issue.
考题
You are the network administrator for Company.You need to connect to Company’s network from your Windows 2000 Professional computer at home.You have a DSL line that is used for Internet connectivity. You create an L2TP virtual private network（VPN） connection and are able to connect successfully to Company’s network. While connected toCompany’s network， you are unable to access the Internet.You want to be able to access the Internet while connected to Company’s network.How should you configure the connection properties？（）A、Configure the DSL connection to use PPTP instead of L2TP. B、Enable Internet Connection Sharing for the DSL connection properties. C、CLEAR THE Use default gateway on remote network check box. D、Clear the Require data encryption check box.
考题
单选题A new building has been added to the enterprise campus network， providing client access for desktop PCs， laptops， and IP phones for employees and guests. During verification， only a few laptops using wireless are reported to have problems， while other desktops， IP phones， and most other wireless laptops are fully operational. Additional information received about the problem indicates that， while the problematic wireless laptops cannot reach internal corporate websites， they can reach the Internet. Where should troubleshooting about this connectivity issue be focused？（）A
client network configurationB
VLAN mappingC
routing protocolsD
first-hop redundancy protocol
考题
单选题While troubleshooting a connectivity issue from a PC you obtain the following information: Local PC IP address: 10.0.0.35/24 Default Gateway: 10.0.0.1 Remote Sever: 10.5.75.250/24 You then conduct the following tests from the local PC: Ping 127.0.0.1 – Successful Ping 10.0.0.35 – Successful Ping 10.0.0.1 – Unsuccessful Ping 10.5.75.250 – Unsuccessful What is the underlying cause of this problem?（）A
A remote physical layer problem exists.B
The host NIC is not functioning.C
TCP/IP has not been correctly installed on the host.D
A local physical layer problem exists.
考题
单选题While troubleshooting a network outage, you discover that an employee brought a switch from home into the office to connect additional equipment to the network. In order to increase his speed, he connected this switch to both network ports in his office, resulting in a bridge loop. Which of these can you implement to prevent future occurrences of this issue?（）A
RSTPB
root guardC
BPDU guardD
GLBP
考题
单选题While troubleshooting a connectivity issue from a PC you obtain the following information: Local PC IP address: 190.0.3.35/24 Default Gateway: 190.0.3.1 Remote Server: 190.0.5.250/24 You then conduct the following tests from the local PC: Ping 127.0.0.1 - Unsuccessful Ping 190.0.3.35 - Successful Ping 190.0.3.1 - Unsuccessful Ping 190.0.5.250 - Unsuccessful What is the underlying cause of this problem?（）A
TCP/IP not correctly installedB
Local physical layer problemC
NIC not functioningD
Remote physical layer problem
考题
单选题You are the network administrator of a small Layer 2 network with 50 users. Lately， users have beencomplaining that the network is very slow. While troubleshooting， you notice that the CAM table of yourswitch is full， although it supports up to 12， 000 MAC addresses. How can you solve this issue and preventit from happening in the future？（）A
Upgrade the switchesB
Configure BPDU guardC
Configure VLAN access listsD
Configure port securityE
Configure Dynamic ARP inspection
考题
单选题While you are troubleshooting network performance issues， you notice that a switch is periodically flooding all unicast traffic. Further investigation reveals that periodically the switch is also having spikes in CPU utilization， causing the MAC address table to be flushed and relearned. What is the most likely cause of this issue？（）A
a routing protocol that is flooding updatesB
a flapping port that is generating BPDUs with the TCN bit setC
STP is not running on the switchD
a user that is downloading the output of the show-tech commandE
a corrupted switch CAM table
考题
单选题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 errorsB
The port is administratively disabledC
The port is blocked by spanning treeD
The port has an active link with normal traffic activity
考题
单选题You are the network administrator of a small Layer 2 network with 50 users. Lately， users have been complaining that the network is very slow. While troubleshooting， you notice that the CAM table of your switch is full， although it supports up to 12，000 MAC addresses. How can you solve this issue and prevent it from happening in the future？（）A
Upgrade the switchesB
Configure BPDU guardC
Configure VLAN access listsD
Configure port securityE
Configure Dynamic ARP inspection
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