FC0-U61 · Question #113
A technician has just finished setting up a SOHO wireless router but the client does not want the PC on the wireless network for security reasons. The technician connects an RJ-45 cable to the…
The correct answer is C. Check for link light activity on the computer and the router. When a wired network connection fails to establish, the initial diagnostic step is to visually inspect the link lights on both the computer's network interface card and the router's port.
Question
A technician has just finished setting up a SOHO wireless router but the client does not want the PC on the wireless network for security reasons. The technician connects an RJ-45 cable to the computer and the router, but does not receive network connectivity. Which of the following is the NEXT step to diagnose the problem?
Options
- AChange the IP address on the computer to match the router.
- BReseat the power cable on the computer and reboot.
- CCheck for link light activity on the computer and the router.
- DChange the hostname of the router to match the computer's network.
How the community answered
(46 responses)- A2% (1)
- B11% (5)
- C80% (37)
- D7% (3)
Why each option
When a wired network connection fails to establish, the initial diagnostic step is to visually inspect the link lights on both the computer's network interface card and the router's port.
Changing the IP address is a Layer 3 (network layer) step and is premature if a physical Layer 1 connection has not been established.
Reseating the power cable and rebooting the computer is a general troubleshooting step but less specific to network connectivity issues than checking link lights.
Checking for link light activity on both the computer's network interface card and the router's Ethernet port is the most immediate and basic diagnostic step to confirm a physical layer connection. If no link lights are active, it indicates a problem with the cable, port, or NIC, preventing any network communication.
Changing the hostname of the router is an administrative task that has no direct bearing on establishing basic physical layer network connectivity.
Concept tested: Troubleshooting wired network connectivity (physical layer)
Source: https://learn.microsoft.com/en-us/windows-server/networking/troubleshoot/troubleshoot-tcp-ip-connection
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