Logical address
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In computer networks, a logical address refers to a network layer address such as an IP address, an X.25/X.121 or IPX address.
In computer architectures, a logical address or virtual address is a memory location accessed by an application program in a system with virtual memory such that intervening computer hardware and/or software maps the virtual address to real (physical) memory. During the course of execution of an application, the same virtual address may be mapped to many different physical addresses as data and programs are paged out and paged in to other locations.
Logical address or virtual address is also used in IBM's VM operating system and in Virtual Device Location.
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This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL.
