100-150 Question 152
Single answerYou are troubleshooting a network connectivity issue on a wired Ethernet connection. The link light on the network interface card (NIC) is blinking amber. What does this most likely indicate?
- A
The connection is functioning properly, and data is being transmitted.
- B
There is a collision or error occurring on the network.
- C
The network cable is unplugged or damaged.
- D
The NIC is powered off or disabled in the operating system.
Show answer and explanation
Correct answer: B
Explanation
A blinking amber light on a network interface card usually signals a problem, such as a collision or error occurring on the network. This is an important visual indicator for troubleshooting network issues at the physical and data link layers.
- A. Incorrect.
A blinking amber light does not typically indicate normal operation. A solid or blinking green light is usually the indication of a properly functioning connection.
- B. Correct.
A blinking amber light often indicates a problem such as a collision or error on the network. This could be caused by issues such as duplex mismatches or physical layer problems.
- C. Incorrect.
If the network cable were unplugged or damaged, the link light would usually be off entirely and not blinking.
- D. Incorrect.
If the NIC were powered off or disabled, the link light would also typically be off.