100-150 Question 142
Select 3You are troubleshooting a network issue for a small business. The users are experiencing intermittent connectivity to the internet. Upon investigation, you notice that the router is connected to a switch, and all devices are connected to the switch. Which of the following should you check to identify the root cause of the issue?
- A
Verify that the router's WAN interface is configured with the correct IP address and gateway settings.
- B
Check for a duplicate IP address conflict on devices connected to the switch.
- C
Ensure that the switch is configured with VLANs for internet access.
- D
Inspect the physical cabling between the router, switch, and user devices.
- E
Verify that the router's firewall settings are blocking outgoing traffic.
Show answer and explanation
Correct answers: A, B, D
Explanation
The problem involves intermittent connectivity to the internet. By verifying the router's WAN interface settings, you ensure the router is properly communicating with the internet. Checking for IP conflicts on the switch helps identify if multiple devices are competing for the same address, which can cause intermittent issues. Inspecting physical cabling ensures the devices are properly connected without hardware faults. These steps address the most likely causes of the problem.
- A. Correct.
This is correct because an incorrect WAN interface configuration on the router could lead to intermittent or no internet connectivity.
- B. Correct.
This is correct because a duplicate IP address conflict can cause intermittent connectivity issues for affected devices.
- C. Incorrect.
This is incorrect because VLANs are not necessarily required for basic internet access in a small business setup. VLAN misconfigurations, however, could cause issues, but VLANs are not typically the issue in this scenario.
- D. Correct.
This is correct because damaged or loose cables can disrupt communication between the devices and cause intermittent connectivity.
- E. Incorrect.
This is incorrect because the issue is intermittent, and a firewall setting blocking traffic would consistently prevent certain connections rather than cause sporadic disruptions.