Logical address

An address generated by the CPU’s commonly referred to as a logical address, whereas an address seen by the memory unit-that is, the one loaded into the memory-address register of the memory~-is commonly referred to as a physical address.

The run-time mapping from virtual to physical addresses is done by a hardware device called the memory-management unit (MMU).

The user program never sees the real physical addresses. The user program deals with logical addresse