A IT support technician is troubleshooting a desktop workstation that suddenly lost network connectivity. The technician has already finished interviewing the user and gathering information regarding recent environmental changes. According to the CompTIA troubleshooting methodology, which of the following actions should the technician take to establish a theory of probable cause? (Select TWO.)
- Question the obvious causes, such as checking if the Ethernet cable has been disconnectedCevap
- Consider top-to-bottom or bottom-to-top OSI layer models to isolate physical versus logical issuesCevap
- CImmediately replace the system motherboard and network card prior to performing further testing
- DReconfigure the central network DNS server to issue a new IP address lease to the client
Cevap
The correct actions are questioning the obvious (checking basic physical connections) and considering structured OSI model approaches to build a theory of probable cause.
Establishing a theory of probable cause requires questioning the obvious (such as physical cable disconnections) and evaluating potential causes systematically using top-down or bottom-up models before testing or making changes.
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CompTIA Troubleshooting Methodology - Step 2: Establish a Theory of Probable Cause