Description: Physical memory addressing refers to the method of directly accessing memory locations in a computer system. In this context, each byte of memory has a unique address that allows the CPU to read or write data at that specific location. This approach is fundamental for memory management in computer systems, as it enables efficient and fast access to stored data. Unlike virtual memory, where addresses are abstract and may not directly correspond to physical memory, physical memory addressing is based on hardware architecture. This means that the operating system and hardware must work together to manage memory effectively, ensuring that processes have access to the memory they need. Physical memory addressing is crucial for system performance, as inefficient management can lead to bottlenecks in data access. Additionally, it is a key concept in low-level programming and application optimization, where direct control over memory may be necessary to maximize efficiency and performance.