Which two statements correctly describe the components of a router? (Choose two.)

Which two statements correctly describe the components of a router? (Choose two.)

• ROM contains diagnostics executed on hardware modules.
• Flash memory does not lose its contents during a reboot.
• RAM permanently stores the configuration file used during the boot sequence.
• ROM contains the most current and most complete version of the IOS.
• Flash contains boot system commands to identify the location of the IOS.
• NVRAM stores a backup copy of the IOS used during the boot sequence.