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Zorluk: ZorTroubleshooting Methodology

A network specialist is troubleshooting a VoIP system issue where users in a newly opened branch office experience one-way audio during external calls. The specialist gathered logs from the phone gateway, verified physical connectivity, and formed a theory that the perimeter firewall is dropping outbound UDP Real-time Transport Protocol (RTP) traffic due to strict inspection rules. To verify this, the specialist duplicated the policy configuration in an isolated staging environment, modified the inspection parameters, and confirmed that two-way audio was fully restored on test calls. Which of the following is the NEXT step the specialist should take according to the CompTIA troubleshooting methodology?

  1. Establish a plan of action to resolve the issue on the production firewall and implement the solution.Cevap
  2. B
    Configure Quality of Service (QoS) voice prioritization policies across all core switches to prevent future latency.
  3. C
    Document the firewall policy findings, configuration changes, and ticket status in the enterprise knowledge base.
  4. D
    Reconfigure the local DHCP server options to assign static IP address leases to the VoIP handsets.

Cevap

Establish a plan of action to resolve the issue on the production firewall and implement the solution.
The scenario describes a technician who has successfully completed Step 3 (Test the theory to determine cause) by proving in a lab setting that modifying firewall inspection resolves the RTP audio drops. The immediate next step in the CompTIA troubleshooting methodology is Step 4: Establish a plan of action to resolve the problem and implement the solution on the live system.

Adım Adım Çözüm

1
Identify the stage of the troubleshooting process reached in the scenario.
The specialist gathered information (Step 1), established a theory regarding RTP payload filtering (Step 2), and tested the theory in an isolated staging environment to confirm the cause (Step 3).
Determining the completed steps establishes where the scenario falls within the standard CompTIA 6-step framework.
2
Determine the next sequential step in the CompTIA troubleshooting framework.
Step 4 is 'Establish a plan of action to resolve the problem and implement the solution.'
Once a theory of cause is confirmed by testing, the technician must plan the implementation (including change management considerations) and apply the resolution to the production environment.

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CompTIA Troubleshooting Methodology Order
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Troubleshooting Methodology

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