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Networking Hierarchy

OSI Model

  Data unit       Examples
Host Layers Data 7 Application Network process to application FTP, SMTP/POP3/IMAP, HTTP
IRPC
6 Presentation Data representation and encryption MIME encoding
5 Session Interhost communication iSCSI
Segments 4 Transport End-to-end connections and reliability TCP
Media Layers Packets 3 Network Path determination and logical addressing IP, Routers
Frames 2 Data Link Physical addressing MAC: Fibre Channel
LLC
Bits 1 Physical Media, signal and binary transmission 1000BASE-SX (GbE)

 

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