4.1. Identify the Status Lights on a Cisco Device When Given Instruction by an Engineer. 100-150 Practice Questions (Page 4)

Questions 16–20

1. 16application · easy

   You are asked to verify that a newly installed Cisco switch port is functioning correctly. The port is connected to a printer that is powered on but idle. What LED state would you expect to see?

   • AOff, because the printer is idle and not sending data.
   • BAmber, because the printer is not a Cisco device.
   • CBlinking green, because the printer is sending keepalive frames.
   • DSolid green, because the link is up and the printer is idle.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   An engineer instructs you to check the link light on a Cisco switch port that connects to a workstation. The light is off. What is the most likely conclusion?

   • AThe port is up but there is no traffic.
   • BThe link is down, possibly due to a faulty cable or the device being powered off.
   • CThe port is blocked by Spanning Tree Protocol.
   • DThe port is operating normally but at a reduced speed.
   Reveal Solution Discussion Select an answer first
4. 18expert · medium

   You are monitoring a Cisco switch and notice that a port's LED is solid green, but the interface counters show a large number of dropped packets. What should you do?

   • ADisable the port, because the drops indicate a security issue.
   • BReplace the cable, because a faulty cable can cause drops even with a solid green LED.
   • CCheck for congestion or buffer exhaustion on the port, because the link is up but packets are being dropped.
   • DReboot the switch, because the LED is not reflecting the drops.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A user reports intermittent network connectivity. You check the switch port LED and see it alternating between solid green and off. What is the most likely cause?

   • AAn unstable physical link, such as a loose cable or a failing NIC, causing the link to drop and re-establish.
   • BThe port is in a spanning-tree loop and is blocking and unblocking.
   • CThe port is experiencing high traffic and the LED is flickering.
   • DThe port is administratively down and the LED is toggling due to a configuration error.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A user reports that their computer cannot reach the network. You check the switch port LED and see it is amber. What is the most likely interpretation?

   • AThe port is passing traffic normally and the amber color is just a cosmetic difference.
   • BThe port is up but the link is operating at a reduced speed or there is a fault, so you should check the cable and the device's NIC.
   • CThe port is administratively down and needs to be re-enabled.
   • DThe port is in a spanning-tree blocking state, which is normal and requires no action.
   Reveal Solution Discussion Select an answer first