From the course: Operating System Forensics
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Memory structure
- [Instructor] There are primarily three different types of memory. They are primary, secondary and cache. Primary memory refers to main memory, which is also called RAM. There is also read-only memory, or ROM, that stores essential information necessary to boot a computer. BIOS uses ROM. Secondary memory is required to store extra data that isn't needed immediately for processing. Examples are solid-state drives, or SSDs, hard drives, and USB drives. The secondary memory devices also store data while computers are turned off. Cache memory is the smallest in capacity but the fastest. In order to be fast, its size has to be small. It sits between a central processing unit, or CPU, and main memory. Cache memory plays the role of a buffer and holds data expected to soon to be used by the CPU. This way the CPU has almost immediate access to the data it needs and doesn't have to wait for the slower main memory unit to respond. The goal here is to minimize the time it takes to load data…
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