A network technician suspects that recent Active Directory logon failures across a branch office are caused by Network Time Protocol (NTP) traffic being blocked by a newly deployed perimeter firewall. To test this theory, the technician creates a temporary logging rule on the firewall and attempts a manual time synchronization from a branch domain controller, observing that outgoing UDP port 123 packets are actively being dropped. Having confirmed that NTP packet blockage is the root cause of the synchronization failure, which of the following actions should the technician perform NEXT according to the CompTIA troubleshooting methodology?
- ADocument the firewall drop logs and root cause analysis in the ticketing system.
- Develop a plan of action to modify the firewall security policy and implement the fix.Cevap
- CPerform system-wide authentication testing to verify that domain controller logon delays are eliminated.
- DQuestion affected branch office users to determine if non-domain devices are experiencing time skew.
Cevap
Develop a plan of action to modify the firewall security policy and implement the fix.
According to the official CompTIA Troubleshooting Methodology, the steps are strictly ordered as: 1) Identify the problem, 2) Establish a theory of probable cause, 3) Test the theory to determine cause, 4) Establish a plan of action to resolve the problem and implement the solution, 5) Verify full system functionality and implement preventive measures, and 6) Document findings, actions, and outcomes. Because the technician has successfully tested and confirmed the theory (Step 3), the immediate next step is to establish a plan of action and implement the solution (Step 4).
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CompTIA Troubleshooting Methodology Order
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