Difference between segmentation and fragmentation?

As for Segmentation in Computer Architecture logic, it's a meaningful unit of information eg procedures, large data structures etc. In segmentation every segment is in its own logical memory it has higher hit ratio meaningful protection of segments simplified sharing of code via dynamic linking dynamic data structures OR Segmentation is one of the most common ways to achieve memory-protection; another common one is paging. Segmentation means that a part or parts of the memory will be sealed off from the currently running process computing, through the use of hardware-register. If the data that is about to be read or written to be outside the permitted address-space of that process, a segmentation-fault will result Segmentation is a memory-management scheme that supports this user view of memory.

A logical address space is actually a collection of segments. Each segment has a name and a length. The address specifies both the segment name and the offset within the segment.

The user therefore specifies each address by 2 parameter: a segment name and an offset.

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