Twocharacteristics of paging and segmentation are the keys to this breakthrough inmemory management:

1.Allmemory references within a process are logical addresses that are dynamicallytranslated into physical addresses at run time.

•Aprocess may be swapped in and out of main memory occupying different regions ofmain memory at different times during the course of execution.

2.A process may be broken up into a number of pieces (pages or segments) andthese pieces need not be contiguously located in main memory during execution.

•The combination of dynamic run-time address translation and the use of a page orsegment table permits this.