Sep 26, 2007

OSI

OSI Model

Data unit Layer Function
Host
layers
Data 7. Application Network process to application
6. Presentation Data representation and encryption
5. Session Interhost communication
Segments 4. Transport End-to-end connections and reliability (TCP)
Media
layers
Packets 3. Network Path determination and logical addressing (IP)
Frames 2. Data link Physical addressing (MAC & LLC)
Bits 1. Physical Media, signal and binary transmission

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