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Article available on Embedding Security in Open Systems
One of the largest problems lies in embedded security defying the propriety model; in other words, the single vendor approach does not allow for an 'open architecture' security solution due to the heterogeneous nature of a network. As a business grows it may be necessary to manage security across a number of vendors, so an NAC solution, that supports open architecture across a variety of vendors and protocols, is the most logical progression.
From this preface, the article goes on to delineate the pros and cons of pre-admission and post-admission NAC solutions. After explaining the difficulties of implementing these methods Marculec defines the TCG's recognised TNC (Trusted Network Connection) solution. The IF-MAP (Interface for Metadata Access Points) open standard provides a common language for NAC, dynamic devices, policies, status, and behaviour to be shared in real-time and can be embedded into products for free by the TCG.
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