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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
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.
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单选题Refer to the exhibt.Host A has tested connectivity to a remote network.What is the default gateway for host A?（）A
172.16.182.1B
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10.16.176.1D
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PhysicalB
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考题
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IPCONFIGB
PINGC
ARPD
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考题
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The host NIC is not functioning.C
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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
the application layer
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