The functional view of a computer system describes the system’s behavior and function, regardless of its internal structure or organization. It defines the purpose and capabilities of the system and how it interacts with its environment.
The functional view can be divided into four major components:
- Input/Output (I/O): This component is responsible for communication between the computer system and the external environment. It includes devices such as keyboards, mice, displays, and network interfaces.
- Memory: This component stores data and instructions for the CPU to process. It includes main memory, such as RAM, as well as secondary storage devices like hard drives.
- Central Processing Unit (CPU): This component executes instructions and controls the operation of the computer system. It includes the arithmetic logic unit (ALU), control unit, and registers.
- System Interconnect: This component connects the other components of the system and facilitates communication and data transfer between them. It includes buses, switches, and other networking hardware.
The structural view of a computer system describes the physical components and their organization that implement the system’s functional behavior. It defines how the system is built and how its components are interconnected.
The structural view can be divided into four major components:
- Input/Output (I/O) Devices: These are the physical devices that allow input and output operations to occur, such as keyboards, mice, and printers.
- Memory Devices: These are the physical components that store data and instructions, such as RAM, hard drives, and flash memory.
- Central Processing Unit (CPU): This is the physical component that executes instructions and controls the operation of the computer system.
- System Interconnect: This includes the physical components that connect the other components of the system, such as buses, switches, and cables.