Scenario: Your organization recently switched to a new ISP, and you've noticed a significant drop in network speed. What would be the best first step to diagnose the issue?

A.  Review SLAs

B.  Conduct a penetration test

C.  Reconfigure the firewall

D.  Perform a network baseline assessment

Answer:  D

Explanation:

• Perform a network baseline assessment: This would help you identify what the normal operating metrics are for your network. By doing this, you can pinpoint what specifically is causing the slowdown. It will give you hard data about whether the issue is related to the ISP change or some other factors within your network.
• Review SLAs: While it's essential to know what you should expect from your ISP according to your Service Level Agreement, this would be a subsequent step after determining that the issue indeed lies with the ISP's service.
• Conduct a penetration test: This is more for security vulnerabilities and not for diagnosing speed issues.
• Reconfigure the firewall: Before reconfiguring any internal systems like a firewall, it's better to identify the root cause of the issue, which is what a network baseline would help with.

Starting with a network baseline assessment provides data-driven insight into what might be causing the problem.