D. It is necessary to set the operating parameters.
Entering the system ROM monitor mode is typically done when the router cannot boot up normally. This mode allows the user to access low-level system functions, such as loading a new operating system image or configuring hardware settings.
Option A and B are possible reasons for the router to enter the system ROM monitor mode. If the router cannot find a valid operating system image, or if it does not have a configuration file, it may enter the monitor mode.
Option C is also a possible reason for the router to enter the monitor mode. If the user interrupts the boot sequence by pressing a key, the router may enter the monitor mode.
Option D, however, is not a reason for the router to enter the monitor mode. Setting operating parameters is typically done when the router is already running, and does not require entering the monitor mode.
it's BD. the question says in which option we CANNOT enter ROM mode not the opposite.
upvoted 2 times
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