What is a Virtual Address?

virtual address

Virtual address space is a collection of virtual addresses. It is used by the Internet to identify computers and other devices. It is also used to send and receive emails. It is similar to the concept of a physical address. However, virtual addresses are more convenient for sending and receiving emails. As a result, more companies are implementing this technology.

Logical address

The difference between a virtual address and a logical address is very important to understand. A logical address is a larger number than a linear address, and it is converted to a linear address via a segment table. The logical address is then translated into a physical address using a page table. This completes the mapping between the logical and physical addresses.

A logical address is a computer address that is generated by the CPU while a program is running. The CPU uses this address to access physical memory. This mapping is done by the Memory-Management Unit (MMU). A computer’s logical address space is the set of all logical addresses generated by a CPU.

A physical address is the actual location in a main memory. A logical address, on the other hand, is a reference to a location in the main memory. The difference between a physical address and a logical address is critical to understanding how computer programs work. While the physical address is the address of the data stored in a computer, the logical address is a reference to a location in memory.

Linear addresses and virtual addresses are similar, but differ in how they are used. The difference is in how they are translated. A logical address is generated by the program code, and a linear address is generated by adding the base address of the corresponding segment. The logical address is then transformed into a physical address by a paging mechanism. In a single computer, the capacity of linear address space is four gigabytes, and the number of address bus segments is two times as large as the number of physical addresses.

Virtual address and logical address correspond to the same physical memory, but the virtual address can be different. In some cases, a virtual address is mapped to physical memory to allow multiple processes to access the same memory. In such a situation, one process may use a virtual memory to store data, while the other will only use a single physical memory. The difference between a logical address and a physical address depends on how the memory model is organized.

Virtual address is mapped to a physical address by a memory management unit (MMU). While the logical address is always the same, it has no meaning to a program until it is executed. A virtual address can also be converted into a physical address by a base register. During execution, additional memory is allocated and deallocated. During this time, dynamic linking is performed.

The virtual address is used when a computer does not have enough physical memory. It allows a process to use its preferred location in the main memory, but it requires more memory than the primary memory. When the virtual address is not large enough, it relegates the data to the internal hard disk or flash drive.