Faculty of computer engineering information security direction

Random Access Memory (RAM)
The computer loads the operating system (OS) from the hard drive into the system's random access memory (RAM).Generally, the critical parts of the operating system are maintained in RAM as long as the computer is on. This allows the CPU to have immediate access to the operating system, which enhances the performance and functionality of the overall systemWhen you open an application, it is loaded into RAM. To conserve RAM usage, many applications load only the essential parts of the program initially and then load other pieces as needed.When you save a file and close the application, the file is written to the specified storage device, and then it and the application are purged (deleted) from RAM.
22 How ROM and RAM work…ROMRAMCPU
23 Secondary Storage Hard Drive (external/internal)
Writable CD-ROMs and DVDsFlash memory“Cloud” Drives
24 Need for Secondary Storage Devices
Primary memory is volatile memory –lose electrical power and this memory loses its contents.Secondary storage stores data on permanent media that maintain their accuracy and integrity, yet permit access.
25 Secondary Storage Devices
Which of these devices is capable of storing the most data?CD-ROM diskDVD diskUSB (flash memory) driveExternal hard drive
26 Secondary Storage Devices
d. External Hard Drive holds the most data.
27 Storage Speed