Memory Protection(OS)

This PPT is on Memory Management.

1. Memory Protection by:- Karanjyot singh & Muntaha Ansari BCA 1 shift .

2. Index What is Memory Protection Need for memory protection Methods of memory protection

3. What is Memory Protection? Memory protection is a mechanism implemented by computer operating systems to prevent a program or process from accessing memory that has not been allocated to it. The primary purpose of memory protection is to enhance the stability and security of a computer system by isolating the memory space of different processes and preventing unintended interference.

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5. Need for memory protection Memory protection is crucial for computer systems, ensuring isolation between processes, preventing unauthorized access, enhancing security, and maintaining system stability. It isolates faults, supports multitasking, and guards against security threats, contributing to the reliable and secure operation of modern operating systems in both single-user and multi-user environments.

6. Method of memory management

7. Memory Protection using Keys Memory protection using keys is like locking different parts of a computer's memory with special codes. Only the parts with the right codes (keys) can be accessed. This helps keep important information safe and makes sure that only authorized users or programs can use specific parts of the computer's memory.

8. Memory Protection using Rings Memory protection using rings is like assigning different levels of access to different parts of a computer's memory. Imagine it as rings of security, where each ring represents a level of permission. The innermost ring has the highest access, and as you move outward, access decreases. This helps control who can do what in the computer's memory, enhancing security.

9. Capability-based addressing Capability-based addressing is like having a special ticket (capability) to access specific areas in a computer's memory. Instead of relying on who you are (like a username), you need this special ticket to get to certain information. It's a way to control and limit access to data, making things more secure.

10. Memory Protection using masks Memory protection using masks is like using a filter to control what parts of a computer's memory can be accessed. A mask is like a set of rules that determines which areas are open and which are blocked. It helps regulate access, keeping information safe and secure from unauthorized use or changes.

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