Discussion
The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?
Answer: C
Correct answer: NVRAM should be erased and the router restarted.
The existing configuration is held in NVRAM, so erase startup-config followed by reload brings the router up clean, in setup mode. Erasing flash would remove the IOS itself, RAM is cleared by the reload in any case, and entering a new configuration over the old one leaves whatever was not explicitly overwritten - addresses, routes, access lists - still in place.
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