Protected mode is a CPU operational mode in x86-compatible processors that allows the use of advanced features like virtual memory, paging, and safe multi-tasking by providing each process with its own address space and protection against unauthorized access. It enhances system stability and security by preventing applications from directly accessing hardware or memory used by the operating system or other applications.

Protected Mode

Protected mode

CPU operational mode

x86-compatible processors

advanced features

Virtual memory is a memory management technique that provides an 'idealized abstraction' of the storage resources available to a process, creating the illusion of a large, continuous memory space. It allows systems to use hardware and software to compensate for physical memory shortages, enabling efficient multitasking and isolation between processes.

virtual memory

Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory, thus reducing fragmentation and allowing for efficient use of RAM. It divides the process's virtual address space into fixed-size blocks called pages, which are mapped to physical memory frames, enabling processes to be easily swapped in and out of the main memory.

paging

safe multi-tasking

Address space refers to the range of discrete addresses that a computer system can use to access memory or storage locations, crucial for managing how data and processes are allocated and accessed in both physical and virtual memory systems. It is a fundamental concept in computer architecture and operating systems, impacting system performance, memory management, and security.

address space

protection against unauthorized access

System stability refers to the ability of a system to return to equilibrium after a disturbance, ensuring consistent and predictable performance over time. It is crucial in various fields, such as engineering, economics, and ecology, where maintaining balance and preventing system failure are essential for optimal functioning.

system stability

System security is the practice of protecting computer systems and networks from digital attacks, unauthorized access, and damage to hardware, software, or data. It involves implementing measures to ensure the confidentiality, integrity, and availability of information and resources within an organization.

CUSTOMIZE YOUR LEARNING

CUSTOMIZE YOUR LEARNING

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