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Modular

Monolithic Kernel

Loadable Modules

 Includes virtually all of the OS  Relatively independent blocks

functionality in one large block
of code that runs as a single  A module is an object file whose
process with a single address code can be linked to and unlinked
space from the kernel at runtime

 All the functional components  A module is executed in kernel
of the kernel have access to all mode on behalf of the current
of its internal data structures process

and routines

 Have two important
 Linux is structured as a characteristics:
collection of modules
 dynamic linking

 stackable modules