Discussion
A network administrator wants to upgrade the IOS of a router without removing the image currently installed. What command will display the amount of memory consumed by the current IOS image and indicate whether there is enough room available to hold both the current and new images?
Answer: A
Correct answer: show flash
show flash lists the files in flash with their sizes and reports the bytes used and available, so it answers both parts of the question - how much the current image consumes and whether the free space will hold a second one. show version reports the total flash fitted but not what remains free, and the memory and buffer commands concern RAM rather than flash.
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