Chapter 20: The Linux System: Kernel, Process Management, and Security

The Linux System: Kernel, Process Management, and Security begins with the history and evolution of Windows, highlighting its transition from earlier versions to the current hybrid kernel architecture that blends features of microkernels and monolithic kernels. The chapter examines the layered design, from the hardware abstraction layer (HAL) to the kernel, executive services, and user-mode subsystems. Process and thread management are explained through Windows’ scheduler, process control blocks, and synchronization primitives such as mutexes and critical sections. Memory management topics include demand paging, virtual address space, and the use of working sets to optimize performance. The file system section covers NTFS, including metadata management, journaling, access control lists (ACLs), and support for large volumes and long file names. I/O management in Windows is explored through the I/O manager, device drivers, and Plug and Play (PnP) services, along with power management features. The chapter also details networking capabilities, including the Windows Sockets API (Winsock) and support for modern protocols. Security is addressed through user authentication, access tokens, privileges, and Windows security models, including integration with Active Directory. By the end, readers gain a comprehensive understanding of how Windows 10’s architecture supports scalability, performance, and security for desktop, server, and enterprise environments.