Immediately after a routine server update, users report they can no longer connect to an application on the server. According to the CompTIA troubleshooting methodology, what is the most likely cause to investigate first?
Changes were made to the server's host-based firewall.
An unresolved hardware alert exists on the server.
The server's virtual LAN (VLAN) assignment was altered.
The CompTIA troubleshooting methodology emphasizes identifying what has changed as an early step. A server update is a significant change that can alter various configurations. Host-based firewall rules are frequently modified during operating system or application updates to enhance security, which can inadvertently block legitimate traffic. Therefore, checking for changes in the firewall configuration is the most logical first step. While other options could potentially cause connectivity issues, they are less directly associated with a recent server update compared to a firewall rule modification.
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Why is it important to check firewall configurations after a server update?
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What are common changes that might be made to firewall configurations?
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How do firewall configurations interact with network traffic?