Discussion
Which command is used to upgrade an IOS on a Cisco router?
Answer: D
Correct answer: copy tftp flash
An upgrade writes a new IOS image from a TFTP server into flash, so the source is tftp and the destination flash. Reversing the two words gives copy flash tftp, which is the backup. copy tftp run and copy tftp start load configuration files rather than images, and config net merges a configuration from the network into the running one.
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