OSI

OSI(APSTNDP-All People Seem To Need Data Processing)Application LayerHTTPSMTPLPDFTPTFTPSNMPTELNETAPIPresentation LayerTIFFJPEGGIFMPEGMIDIASCIIEBCDICcompressionencryptionSession LayerApplication-to-ApplicationRPCNFSSQLNetBIOSSimplexHalf-duplexFull-duplexTransport Layercomputer-to-computerTCPUDPSPXSSL/TLSNetwork LayerIPIPXICMPRIPOSPFBGPIGMPData Link LayerLogical Link Control (LLC)-IEEE802.2Media Access Control (MAC)-IEEE802.3SLIPPPPARPRARPL2FL2TPFDDIISDNPhysical LayerHigh-Speed Serial Interface (HSSI)X.21EIA/TIA-232 and EIA/TIA-449
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