The customer of a networking company requires VPN connectivity for workers who must travel frequently. To support the VPN server, the customer router must be upgraded to a new Cisco IOS software version with the Advanced IP Services feature set. What should the field engineer do before copying the new IOS to the router?
- Set the router to load the new IOS image file directly from the TFTP server on the next reboot.
- Delete the currently installed IOS by using the erase flash: command, and reload the router
- Issue the show running-configuration command to determine the features of the currently installed IOS image file.
- Issue the show version and the show flash commands to ensure that the router has enough memory and file space to support the new IOS image.