SG0-001 · Question #371
If network card link light is on and there is no data flow, which of the following might be the problem?
The correct answer is A. Incorrect configuration on NIC. If the NIC link light is on but there's no data flow, it indicates a physical connection exists, but a logical issue like an incorrect IP address or driver problem is preventing communication.
Question
If network card link light is on and there is no data flow, which of the following might be the problem?
Options
- AIncorrect configuration on NIC
- BNot patched correctly
- CDevice not turned on
- DWrong cable
How the community answered
(59 responses)- A78% (46)
- B7% (4)
- C12% (7)
- D3% (2)
Why each option
If the NIC link light is on but there's no data flow, it indicates a physical connection exists, but a logical issue like an incorrect IP address or driver problem is preventing communication.
An incorrect configuration on the NIC, such as a wrong IP address, subnet mask, default gateway, or DNS settings, could allow the physical link to be established (link light on) but prevent any successful data transmission at the network or transport layers. A malfunctioning driver or an incorrectly set speed/duplex could also cause this logical failure.
If the cable were not patched correctly, the link light would typically be off, as a physical connection would not be established.
If the device were not turned on, the network card would have no power, and its link light would be off.
If a wrong or faulty cable were used preventing a proper link, the link light would usually be off.
Concept tested: Troubleshooting network connectivity
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