100-150 Question 146
Select 2An engineer asks you to verify the status of a Cisco router's interface by observing the status lights. The engineer instructs you to identify an interface that is operational and transmitting data. Which status light indicators would confirm this?
- A
Green light that is solid or blinking
- B
Amber light that is solid
- C
No light visible
- D
Red light that is solid or blinking
- E
Green light that blinks intermittently
Show answer and explanation
Correct answers: A, E
Explanation
Cisco devices use status lights to indicate the health and activity of interfaces. A green light, whether solid or blinking, shows the interface is operational, with the blinking indicating active data transmission. Other colors, such as amber or red, typically signal issues, while no light means the interface is down or disconnected.
- A. Correct.
A green light that is solid or blinking typically indicates the interface is operational, with the solid green showing the link is up and blinking green indicating data transmission.
- B. Incorrect.
An amber light that is solid usually indicates a problem or fault with the interface, such as a physical connectivity issue or misconfiguration.
- C. Incorrect.
No light visible often means the interface is administratively down or there is no physical connection.
- D. Incorrect.
A red light (solid or blinking) signals a critical issue or hardware failure in the interface.
- E. Correct.
A green light that blinks intermittently indicates that the interface is transmitting or receiving data, confirming it is operational.