: Before upgrading, it's wise to back up your current IOS image, in case you need to revert.
The k9 designation confirms it includes strong payload encryption (3DES/AES). 3. Deployment & Download
with "k9" (strong encryption) support. It requires appropriate Software Licenses
: Use a TFTP or FTP server to move the .bin file to the router's flash: copy tftp: flash:
To obtain a legitimate copy of this IOS binary, you must have a valid Cisco Service Contract (CON).
Cisco IOS Software: C1900-UNIVERSALK9-MZ.SPA.158-3.M7.BIN Overview