Describe a router's NVRAM component.
What will be an ideal response?
Nonvolatile random access memory (NVRAM) is a special type of RAM that is not cleared when the router is rebooted. The startup configuration file for the router is stored in NVRAM by default. When the router is first shipped, the configuration file is not present. This is the first file created by the person who sets up the router.
The Cisco IOS uses the configuration file in NVRAM during the router boot process, which is explained in the next chapter. Whenever the configuration of the router is updated, the administrator copies the running configuration, which is the one that has just been updated, to the startup configuration. The startup configuration is maintained in NVRAM, whereas the running configuration is maintained in RAM/DRAM.
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