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In computing, a virtual address space (VAS) or address space is the set of ranges of virtual addresses that an operating system makes available to a process. [1] The range of virtual addresses usually starts at a low address and can extend to the highest address allowed by the computer's instruction set architecture and supported by the operating system's pointer size implementation, which can ...
Virtual address refers to an address identifying a virtual, i.e. non-physical, entity. For example: Virtual address space in computing; Virtual address translation to physical address in computing; Virtual postal address, see virtual mailbox or commercial mail receiving agency; Virtual business address, see Virtual office
An iconic example of virtual-to-physical address translation is virtual memory, where different pages of virtual address space map either to page file or to main memory physical address space. It is possible that several numerically different virtual addresses all refer to one physical address and hence to the same physical byte of RAM .
The system was designed to offer backward compatibility with the PDP-11 while extending the memory to a full 32-bit implementation and adding demand paged virtual memory. The name VAX refers to its Virtual Address eXtension concept that allowed programs to make use of this newly available memory while still being compatible with unmodified user ...
A virtual IP address (VIP or VIPA) is an IP address that does not correspond to a physical network interface. Uses for VIPs include network address translation (especially, one-to-many NAT ), fault-tolerance, and mobility .
Virtual address, a computer memory location in virtual address space; Vertical alignment, a technology used in a modern liquid-crystal display; Visual analytics, business intelligence visualization tools; Vulnerability assessment, the process of identifying and quantifying vulnerabilities in a system
Virtual addresses seen by the program are added to the contents of the base register to generate the physical address. The address is checked against the contents of the bounds register to prevent a process from accessing memory beyond its assigned segment. The operating system is not constrained by the hardware and can access all of physical ...
Virtual address space From a short name : This is a redirect from a title that is a shortened form of a more complete page title, such as a person's full name or the unbroken title of a written work. Use this rcat ( not {{ R from initialism }} nor {{ R from abbreviation }} ) to tag redirects that are the initials of a person's name.