What is multi level paging?

Multi-level paging is a memory management scheme that uses multiple levels of page tables to translate virtual addresses to physical addresses in a system. Instead of having a single page table that can grow large with increased memory size, multi-level paging divides the page table into smaller, hierarchical tables, reducing the memory overhead for page management. This approach allows for more efficient use of memory by only allocating space for page tables that are actually needed, enabling systems to handle larger address spaces with less fragmentation. It also helps mitigate the issue of page table size in systems with sparse address spaces.