# Memory frame

A frame is a fixed-size block of physical memory used in a paging system . When a process requests memory, its virtual address space is divided into pages of the same size, and the operating system maps these pages to available frames in physical memory . The MMU handles this mapping using a page table . Since frames and pages are of equal size, paging avoids external fragmentation, though it may introduce internal fragmentation if a page does not fully utilize a frame.