TechRepublic - IT Security: Understanding layered security and defense in depth

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What are "layered security" and "defense in depth" and how can they be employed to better protect your IT resources? Understanding these strategies and how they can be used to improve your own security is important for any system or network administrator.

December 18th, 2008
By Chad Perrin

Sometimes it seems like everybody talks about “layered security”, “layered defense”, or “defense in depth”, but nobody really knows what it means. The three phrases are often used interchangeably — but just as often, someone will use two of them to mean completely different things. There are actually two separate, but in some respects very similar, concepts that may be named by these phrases.
Layered Security

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