A customer called the cable company to report that the Internet connection is unstable. After trying several configuration changes, the technician decided to send the customer a new cable modem to try. What troubleshooting technique does this represent?
- top-down
- bottom-up
- substitution
- divide-and-conquer
Explanation: During troubleshooting, when the problem seems to be caused by a defective hardware, one approach is to replace the suspected hardware with a known good one. While not necessarily locating the problem, this technique can save time and quickly restore system functionality.
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