A network administrator changes the configuration register to 0x2142 and reboots the router. What are two results of making this change? (Choose two.)
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A. B. C. D. E.BD
When a network administrator changes the configuration register of a Cisco router to 0x2142 and reboots the router, the following two results are observed:
B. The router will prompt to enter initial configuration mode:
When the configuration register is set to 0x2142, the router will bypass the current configuration in NVRAM and load the default configuration stored in ROM. This default configuration instructs the router to enter the initial configuration mode, which allows the administrator to create a new configuration or load a backup configuration from a TFTP server.
D. Any configuration entries in NVRAM will be ignored:
When the configuration register is set to 0x2142, the router ignores the configuration entries stored in NVRAM. This means that any configuration changes made to the router before the configuration register was changed will not be loaded during the boot process.
Other answer options explained:
A. The IOS image will be ignored:
This is not correct. Changing the configuration register value to 0x2142 does not affect the IOS image stored in flash memory. The router will still use the IOS image for booting.
C. The router will boot to ROM:
This is partially correct. Changing the configuration register value to 0x2142 instructs the router to load the default configuration stored in ROM, but it does not mean that the router will boot to ROM. The router will still boot from the IOS image stored in flash memory.
E. The configuration in flash memory will be booted:
This is partially correct. The router will still boot from the IOS image stored in flash memory, but the configuration in flash memory will not be loaded because the configuration register is set to 0x2142, which instructs the router to ignore the configuration in NVRAM.