When information is requested from the computer's memory, the central processing unit (CPU) first accesses the main memory, also known as random access memory (RAM), and checks to see whether the information being sought is stored on the memory page in question. In the event that it is absent, the central processing unit will execute paging on the secondary memory, which means that it will read data from the hard drive-in equal chunks of memory that are referred to as pages. When it comes to paging, a frame represents a single page of physical memory, but such pages do not need to be physically contiguous with one another. This guarantees that memory can be accessed more quickly, and that data can be retrieved from secondary memory more quickly.