What type of security is associated with each level of the OSI model?
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The OSI reference model for networking (ISO 7498-1) is designed around seven layers arranged in a stack. The OSI security architecture reference model (ISO 7498-2) is also designed around seven layers, reflecting a high level view of the different requirements within network security.
|Layers (ISO 7498-1)||ISO 7498-2 Security Model|
|Data Link||Assurance / Availability|
|Physical||Notarization / Signature|
Here's a very good paper on OSI model in reference to information security, by SANS Institute.
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