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Idaho State University

Glossary

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Address Space
  • The range of addresses that can be accessed by a process. Virtual address space is the range as though the addresses went from 0 to whatever upper limit is imposed by the virtual address manager. The actual address and location of the data may bear little resemblance to the address as seen by the process; there is no limit on the size of virtual address space other than secondary storage capacity. Physical or actual address space is the actual memory locations that may be referenced. The limit of the range is imposed by the physical memory implementation. For security purposes the address space allowed to a process must be limited to a set that has no physical intersection with the trusted computer base or other sensitive processes, or any other user's process(es).