A technician is troubleshooting a desktop computer on a corporate network that can reach internal resources by IP address but fails to connect to websites using domain names. The technician has gathered information from the user and confirmed the physical link is active. Which TWO of the following steps should the technician take next to establish and test a theory of probable cause according to the CompTIA troubleshooting methodology? (Select TWO.)
- Inspect the local IP configuration to confirm the primary DNS server IP address is configured correctlyAnswer
- BReconfigure the central DHCP server scope options to reassign IP pools across all network subnets
- Execute the nslookup command in the command prompt to test domain name resolution against the configured DNS serverAnswer
- DReplace the local network switch with an unmanaged Layer 2 switch to route traffic between IP subnets
Answer
The technician should inspect the local IP configuration to confirm the DNS server address is correct and execute the nslookup command to test hostname resolution.
Verifying the configured DNS server IP address on the workstation and running `nslookup` directly address name resolution diagnostics. These actions allow the technician to test whether domain name resolution is misconfigured locally or failing at the DNS server level, perfectly aligning with establishing and testing a theory of probable cause.
Step-by-Step Solution
Key Concept
CompTIA Troubleshooting Methodology - Establishing and Testing a Theory of Probable Cause
Estimated Time:1m 30s