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Explain the seven layers of the osi model in detail


Questions:

Network Security: Seven Layers of Open Systems Interconnection

1. Explain the seven layers of the OSI model in detail.

2. At which layers do packet-filtering routers and firewalls reside?

3. How do packet-filtering routers and firewalls protect a network?

Include at least one reference.

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Computer Network Security: Explain the seven layers of the osi model in detail
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