Operating system paging and segmentation

Operating system paging and segmentation

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  P A GI N G A N D S E G M E N T A T I O N Operating system Harmain haider(23) Hamza haseeb (14)
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  paging?  Paging isa memory management technique in which memory is divided info fix size pages.  Paging is use for faster access to data.  It is a logical concept.
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  Why we usepaging ?  Paging is a memory management technique.  Paging allows the physical address space of the process to be non contiguous.
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  Paging hardware
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  Advantages and disadvantagesof paging  Advantages :  no external fragmentation. Simply memory management algorithm. Swapping is easy(equal sized pages and page frame).  Disadvantages: Internal fragmentation. Page tables may consume more memory.
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  Segmentation?  Segmentation isone of the most common ways to achieve memory protection.  The user will view as a combination of segments.  Each memory segment is associated with a specific length and set of permissions.
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  Advantages and disadvantagesof segmentatioin  Advantages :  no internal fragmentation. Segment tables consume less memory than page. Lends itself to sharing data among processes. Lends itself to protection.  Disadvantages: Costly memory management algorithm.