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多选题
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 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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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
pingB
traceC
show ip routeD
show interfaceE
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802.1 1gB
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The host NIC is not functioning.C
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Local physical layer problemC
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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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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
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