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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 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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考题
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pingB
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考题
单选题A technician is troubleshooting a host connectivity problem. The host is unable to ping a server connected to Switch_A. Based on the results of the testing, what could be the problem（）。A
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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 errors.B
The port is administratively disabled.C
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考题
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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 connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist?（）A
the session layerB
the protocol layerC
the data link layerD
the access layerE
the network layerF
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TCP/IP not correctly installedB
Local physical layer problemC
NIC not functioningD
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考题
多选题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？（）AThe K-values do not matchBThe hold times do not matchCThe hello times do not matchDThe AS numbers do not match
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