By default, from which hardware component is the startup copy of theScreenOSloaded?

A.
ROM

B.
NVRAM

C.
TFTP server

D.
Internal Flash

E.
PCMCIA Card

Explanation:

EachNetscreendevice has a similar design for its internal system components. Long-term storage on the device is stored into flash memory. Flash memory is a non-volatilentypeof memory that retains information after the system is turned off. Some devices have a Personal Computer MomoryCard International Association (PCMCIA) card slot for external storage. This card is still just flash memory, but it is removable; the internal flash is not. All of the component information thatNetscreenneeds to store is in flash memory, includingScreenOSlog files, license keys, attack databases, and virus definitions.
EachNetscreendevice also contains Random Access Memory (RAM). This is a volatile type of memory that is lost whenever the system is powered off or reset. When theNetscreendevice powers on, and after the power on self test (POST) is completed, theScreenOSimage is loaded into RAM. AfterScreenOSis up and functional, it loads the saved configuration file from flash memory. The configuration that is stored in RAM is called the running configuration. Whenever you make a change to the configuration it is always saved to the running configuration.