Dynamic address translation:

 If, when executing an instruction, a CPU fetches an instruction located at a specific virtual address, or fetches data from a particular virtual address or stores data to a specific virtual address, the virtual address have to translated to the equivalent physical address. It is done by a hardware component, sometimes that called a memory management unit, which looks up the real address (from the page table) equivalent to a virtual address and passes the real address to the parts of the CPU that execute instructions.