Examkin

Soru

Zorluk: Çok zorTroubleshooting Methodology

A network administrator is investigating an issue where client computers on a newly provisioned VLAN fail to receive dynamic IP address leases from the central DHCP server, whereas statically configured devices on the same segment communicate normally. The administrator has already gathered details from affected users, verified physical port connectivity, and confirmed the scope of the issue. The administrator is currently in the stage of establishing a theory of probable cause. Which of the following actions should the administrator take during this specific stage? (Select TWO.)

  1. Question obvious potential causes, such as checking whether an IP helper address (DHCP relay) is missing on the default gateway router interface.Cevap
  2. B
    Deploy a configuration update to alter the central DHCP scope range prior to testing candidate hypotheses.
  3. Apply a structured OSI model approach (such as top-down or bottom-up) to systematically evaluate candidate failure points.Cevap
  4. D
    Replace the default gateway router with an unmanaged Layer 2 switch to enable broadcast packet traversal across subnets.

Cevap

The administrator should question obvious potential causes (such as verifying if an IP helper address is missing on the gateway) and utilize an OSI model approach to systematically evaluate candidate failure points.
In the CompTIA troubleshooting methodology, Step 2 consists of establishing a theory of probable cause by questioning the obvious and using logical frameworks (such as top-down or bottom-up OSI troubleshooting). Checking whether the gateway router lacks an IP helper address (DHCP relay) represents questioning the obvious for cross-VLAN DHCP failures, while applying OSI layering provides a structured approach to form hypotheses.

Adım Adım Çözüm

1
Determine the current stage of the CompTIA troubleshooting methodology.
The scenario specifies that problem identification (Step 1) is complete, and the technician is currently at Step 2: Establish a theory of probable cause.
Actions must align specifically with Step 2 activities rather than jumping to implementation or misdiagnosing architectural roles.
2
Identify valid actions for establishing a theory of probable cause.
Valid Step 2 techniques include questioning the obvious and using structured frameworks like top-down, bottom-up, or divide-and-conquer OSI model analysis.
These techniques allow the administrator to formulate testable hypotheses regarding why DHCP broadcasts are not reaching the server.
3
Evaluate and eliminate invalid distractor actions.
Deploying configuration updates skips to solution implementation (Step 4) without testing theories. Replacing a router with an unmanaged switch misinterprets Layer 2 vs Layer 3 boundaries.
Premature implementation violates methodology order, and unmanaged switches cannot handle IP routing across subnets.

Anahtar Kavram

CompTIA 6-Step Troubleshooting Methodology: Establishing a Theory of Probable Cause
Bu soruyu puanla

Konular

Troubleshooting Methodology

Bu konudan daha fazla soru