The concept of layered components that make up an operating system also originated with UNIX. Briefly describe this concept as it applies to UNIX/Linux systems.
What will be an ideal response?
The concept of layered components that make up an operating system also originated with UNIX. Layers of software surround the computer system's inner core to protect its vital hardware and software components and to manage the core system and its users. The layers of a UNIX system form a pyramid structure.
At the bottom of the pyramid is the hardware. At the top are the users. The layers between them provide insulation, ensuring system security and user privacy. The kernel is the base operating system, and it interacts directly with the hardware, software services, application programs, and user-created scripts (which are files containing commands to execute). It is accessible only through Kernel mode, which is reserved for the system administrator. This prevents unauthorized commands from invading basic operating system code and hardware, resulting in actions that might hang or disrupt smooth operating system functions. User mode provides access to higher layers where all application software resides.
This layered approach, and all other UNIX features,were designed by programmers for use in complex software development.
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