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<td valign="top">[[Image:Security+_essentials_essentials_cover.jpgpng|Click to Read Security+ Essentials]]<td>[[Security+ Essentials]] is an online book designed for both those studying for the CompTIA Security+ exam and for those interested in learning key issues involves in designing and implementing secure IT environments. Security+ Essentials is largely a platform agnostic book and as such many of the concepts described apply equally to a range of popular operating systems including Windows, Linux, MacOS X and UNIX. On completion of this book it is intended that the reader will have a clear understanding of both the threats faced by IT infrastructures together with a basic understanding of the steps involved in planning and implementing a comprehensive multi-layered IT security strategy.