4.1. Identify the Status Lights on a Cisco Device When Given Instruction by an Engineer. 100-150 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   An engineer asks you to observe the link light on a Cisco router interface. The light is blinking green. What does this typically indicate?

   • AThe interface is up and there is active traffic.
   • BThe interface is in a disabled state.
   • CThe interface is down due to a cable fault.
   • DThe interface is experiencing errors and dropping packets.
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2. 2expert · medium

   You are monitoring a Cisco switch port that is connected to a critical server. The LED is blinking green at a steady rate, but the server's performance is degraded. You suspect the port is experiencing errors. What should you do?

   • ADisable the port and re-enable it, because the blinking indicates a loop.
   • BReplace the cable immediately, because blinking green indicates a faulty cable.
   • CCheck the interface counters for errors, because the LED only indicates activity, not error rates.
   • DReboot the switch, because the LED is stuck in a blinking state.
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4. 3application · medium

   A network engineer asks you to check the status of port Gi0/1 on a Cisco switch. You see the link LED is solid green, but the switch's interface statistics show a high number of input errors. What does the solid green LED indicate, and what should you do next?

   • AThe port is administratively up and has an active link, but the high error count suggests a physical-layer issue such as a bad cable or duplex mismatch, so you should inspect the cable and check duplex settings.
   • BThe port is up but the high error count is normal for a solid green LED, so no action is needed.
   • CThe port is in a disabled state and the LED is showing a false positive, so you should shut down the port and re-enable it.
   • DThe port is receiving traffic but the LED is stuck, so you should reboot the switch to clear the error counters.
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5. 4application · medium

   A technician is at a Cisco switch and the engineer asks, 'Check the port connected to the server — is it up and passing traffic?' The technician sees the link LED is solid green. What should the technician report?

   • AThe port is experiencing excessive errors and the LED is stuck green.
   • BThe port has an active link, but traffic activity is not indicated by a solid green LED.
   • CThe port is administratively down.
   • DThe port is in a standby mode and will blink when active.
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6. 5application · medium

   A technician is instructed by an engineer to verify that a Cisco switch port is not disabled. The technician sees the port LED is off. What should the technician do?

   • ACheck the cable and the connected device before concluding the port is disabled.
   • BReport that the port is up but the LED is broken.
   • CReport that the port is passing traffic but the LED is not visible.
   • DReport that the port is disabled because the LED is off.
   Reveal Solution Discussion Select an answer first