Q9. You are a network administrator and troubleshooting a Catalyst switch for possible problem. Which of the following is the first step in diagnosing a problem?
A. Check vlan configuration using 'show vlans' command.
B. Check the switch interfaces using the command ' show interfaces'
C. Reset the switch, in most cases reset will work
D. Check the status of LEDs or other physical indicators for any obvious problem.
Correct Answer: D
The first step in troubleshooting a device is to examine the physical indicators such as LEDs. Check if there is any visual hints. This may lead to a failed power supply or disconnected cable.
Next check Layer 1 connectivity, and then Layer 2 connectivity. The vlan and vtp information can be obtained and diagnosed at this point.
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