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CompTIA Security+ All-in-One Exam Guide, Third Edition by Chuck Cothren, Roger Davis, Dwayne Williams, Gregory White, Wm. Arthur Conklin

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Operating System and Network Operating System Hardening

The operating system (OS) of a computer is the basic software that handles things such as input, output, display, memory management, and all the other highly detailed tasks required to support the user environment and associated applications. Most users are familiar with the Microsoft family of operating systems: Windows 95, Windows 98, Windows NT, Windows 2000, Windows ME, Windows XP, Vista, Windows 2003, and Windows 2008. Indeed, the vast majority of home and business PCs run some version of a Microsoft OS. Other users may be familiar with Mac OS, Solaris, or one of the many varieties of UNIX.

A network operating system (NOS) includes additional functions and capabilities to assist in ...

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