Virtual address
1. A memory location accessed by an application program in a system with virtual memory such that intervening 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.
2. In IBM’s VM operating system, Virtual Device Location.
(2001-01-02)
Read Also:
- Virtual cache
A cache which uses virtual address, i.e. it is between the processor and the memory management unit. A virtual cache cannot recognise external access to physical address, e.g. from DMA. The whole cache must be flushed when swapping between tasks which share same virtual address space. (1994-11-30)
- Virtual cautery
virtual cautery vir·tu·al cautery (vûr’chōō-əl) n. See potential cautery.
- Virtual circuit
networking A connection-oriented network service which is implemented on top of a network which may be either connection-oriented or connectionless (packet switching). The term “switched virtual circuit” was coined needlessly to distinguish an ordinary virtual circuit from a permanent virtual circuit. (One of the perpetrators of this confusion appears to be [“Networking Essentials”, 1996, Microsoft […]
- Virtual circuit identifier
networking (VCID) An identifier used for the routing of a virtual circuit. An ATM switch may route according to a Virtual Circuit Identifier, a Virtual Path Identifier, or a combination. (2001-05-16)
- Virtual classroom
noun a mode of computer-based education whereby the teacher interacts with students either via video-conferencing, Internet broadcast, or email