A desktop computer in a corporate office suddenly loses access to the company intranet after a workstation relocate. A technician is dispatched to troubleshoot the issue using a standard OSI bottom-up approach. In what sequence should the technician perform the following diagnostic steps?
- 1Inspect the physical RJ-45 cable connections and check the link LED lights on the Network Interface Card (NIC).
- 2Execute the ipconfig /all command to verify whether the host has received a valid IP address or an APIPA address.
- 3Ping the local default gateway address to confirm local network segment communication.
- 4Perform an nslookup query to verify domain name resolution for the intranet server.
Answer
The correct troubleshooting sequence from first to last is: 1) Inspect the physical RJ-45 cable connections and link LED lights, 2) Execute ipconfig /all to verify IP configuration, 3) Ping the local default gateway address, 4) Perform an nslookup query to test domain name resolution.
Following the standard bottom-up troubleshooting methodology, the technician begins at Layer 1 by physically checking cable connections and NIC status LEDs. Next, at Layer 2/3, local IP addressing is checked with ipconfig /all. Third, Layer 3 routing reachability is verified by pinging the default gateway. Finally, higher-layer services such as DNS resolution are tested with nslookup.
Step-by-Step Solution
Key Concept
OSI Model Bottom-Up Network Troubleshooting Sequence
Estimated Time:1m 30s