copy tftp flash vs boot system tftpI 1

[gsplsngr]

In sybex it gives the question and answer to this


&Question113=What command will you use to have your router load an IOS from a TFTP host?
&Answer113=boot system tftp


Which command is used to load an IOS from a TFTP host?
&Answer120=copy tftp flash

how are these different????

 

[KiscoKid]

The Boot System TFTP command is telling the router where to locate an IOS image on bootup. If successful, the router will load this image into its main memory. Once powered off, the router will lose the IOS and will need to load it again from TFTP on reboot, i.e. the IOS is not stored permanently on the router.

The Copy TFTP Flash command is how you copy a new IOS from TFTP to the router's onboard Flash memory. The IOS is now stored permanently on the router and therefore it doesn't require a TFTP server with a valid IOS image to boot from.