What is Kernel Mode in an operating system?

Kernel Mode is a fundamental part of an operating system's functionality, as it is the mode in which core operating system components operate. This mode provides unrestricted access to the system's hardware resources, enabling the operating system to execute important tasks such as memory management, process scheduling, and device control. Kernel Mode allows these components to directly interact with hardware components like the CPU, memory, and I/O devices without any restrictions.

In contrast to user applications, which run in User Mode and have restricted access to system resources for security and stability reasons, Kernel Mode is essential for the operating system to maintain control and protection over the system as a whole. By separating the two modes, the operating system ensures that user applications cannot interfere with the core functions or compromise system security.

The other options do not correctly define Kernel Mode. For example, User Mode is designated for applications, while the reference to network drivers suggests a more limited scope than the general functioning of the entire operating system's core. The mention of a "safe mode for troubleshooting" relates to a specific operational state used for recovery or diagnostics, rather than the standard operational contexts of Kernel Mode.