Root Cause Analysis

Correct Answer: Application logs and network logs

The best place to start when a website application goes down and comes back without any human intervention is the 'Application logs and network logs'. These would give you information on what happened right before, during and after the outage. They might show error messages, timeouts and other issues that could point towards the root cause of the outage. The 'Upgrade server hardware' is not an immediate step without diagnosing the problem. The 'Reset all user passwords' option is irrelevant if there's no security breach or user access issue. The 'Review change management documentation' could be helpful, but only after inspecting the logs and understanding what went wrong.

Correct Answer: Check for network congestion or heavy usage

When users complain about slow internet access, the first step should be to check for network congestion or heavy usage. During certain peak hours, there might be a lot of users using the network which can slow down the internet speed. Also, some applications or services might consume a lot of bandwidth which can also lead to slower internet speeds. Replacing all Ethernet cables, upgrading the switches to higher speed models, or changing internet service providers should only be considered if a detailed investigation reveals that these are the sources of the problem.

Correct Answer: Inspect Quality of Service (QoS) configuration settings

When users are reporting poor voice quality during VoIP calls on a network, the initial step should be to Inspect Quality of Service (QoS) configuration settings. Quality of Service configurations are critical in maintaining the quality of data transmission in a network. They prioritize traffic to ensure crucial data, like VoIP calls, do not suffer from poor quality due to bandwidth issues. The other answers are not as effective as a first step: Replacing all VoIP phones with newer models can be costly and may not address the root cause of the problem, Upgrading to a faster internet connection without investigating potential internal network issues may not improve the quality of VoIP calls, and Switching to a different VoIP service provider should only be considered if other troubleshooting steps fail to resolve the issue or if the provider is indeed the cause of the problem.