Seven Layers of OSI Model

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OSI Layer Models and Definition

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7 Terms

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  1. Application

Provides user interface and network services to end users. Ex. HTTP

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  1. Presentation

Translates, encrypts, and compresses data for the Application layer. Ex. SSL

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  1. Session

Establishes, manages, and terminates communication sessions. Ex. NetBIOS

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  1. Transport

Provides end-to-end communication, reliability, and flow control. Ex. TCP

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  1. Network

Determines best path for data and handles logical addressing. Ex. IPv4

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  1. Data Link

Packages bits into frames; handles MAC addressing and error detection. Ex. VLAN or MAC

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  1. Physical

Transmits raw bits over physical media. Ex. Bluetooth or Ethernet Cables