Discuss Cisco 100-150 Exam Topic 3 Question 2

A support technician examines the front panel of a Cisco switch and sees 4 Ethernet cables connected in the first four ports. Ports 1, 2, and 3 have a green

LED. Port 4 has a blinking green light.

What is the state of the Port 4?

ALink is up with cable malfunctions.

BLink is up and not stable.

CLink is up and active.

DLink is up and there is no activity.

Suggested Answer: C

On a Cisco switch, a port with a blinking green LED typically indicates that the port is up (active) and is currently transmitting or receiving data. This is a normal state indicating active traffic on the port.

* A. Link is up with cable malfunctions: Usually indicated by an amber or blinking amber light.

* B. Link is up and not stable: Not typically indicated by a green blinking light.

* D. Link is up and there is no activity: Would be indicated by a solid green light without blinking.

Thus, the correct answer is C. Link is up and active.

* Cisco Switch LED Indicators

* Cisco Ethernet Switch LED Patterns

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21 comments · newest first

Armando 27 days ago

D doesn’t fit. There’s clearly some activity with that blinking light.

Rasheeda 1 month ago

I lean towards B too. Blinking indicates some activity but not reliable.

Bobbye 1 month ago

Definitely A or B. Malfunctions or instability.

Nu 1 month ago

I feel like it could be C, but the blinking suggests otherwise.

Luis 2 months ago

Agreed, B seems right. Link is up but not stable.

Glenna 2 months ago

I think Port 4 is unstable. Blinking light means issues.

Wilburn 2 months ago

B is the best choice. It's active but not reliable.

Cordell 2 months ago

D doesn't fit. There's definitely activity with that blinking light.

Earlean 2 months ago

No way, C is too optimistic. Blinking means something's off.

Hector 2 months ago

I feel like it could be A too. Malfunctions can cause blinking.

Daisy 3 months ago

Agreed, B seems right. Link is up but not stable.

Luisa 3 months ago

I think Port 4 is unstable. Blinking light means issues.

Lisbeth 3 months ago

I disagree, it could be a sign of a malfunction.

Laurel 3 months ago

I'm surprised it's not just a cable issue.

Goldie 3 months ago

Blinking green usually means there's some activity.

Edda 3 months ago

I think it's active but with issues.

Herschel 4 months ago

Port 4 is definitely not stable.

Catarina 4 months ago

I feel like I’ve seen this scenario before, and I think the blinking light usually means there’s activity but not consistent, so maybe B is the right choice.

Orville 5 months ago

I’m a bit confused because I thought a blinking light meant there was some data being transmitted. Could it be option C instead?

German 6 months ago

I remember a practice question where a blinking light meant the link was up but not stable. So, I might lean towards option B.

Arminda 6 months ago

I think the blinking light on Port 4 indicates some kind of activity, but I'm not sure if it's stable or not.

Cisco 100-150 Exam - Topic 3 Question 2 Discussion