协议基础OSIModelOverviewDataFlowLayersTransportData-workPhysicalApplication(Upper)FTPASCIIEBCDICJPEGKeepingdifferentapplications’dataseparateUserInterfaceHowdataispresentedSpecialprocessingsuchasencryptionOperatingSystem/essSchedulingExamplesSessionPresentationApplicationRoleofApplicationLayersKeepingdifferentapplications’FTPASCIIEBCDICJPEGOperatingSystem/essSchedulingTransportData-workPhysicalExamplesSessionPresentationApplicationRoleofApplicationLayersRoleofDataFlowLayersEIA/TIA-232,wirespeed,andpin-/TIA-232esstomediausingMACaddressErrordetectionnotcorrectionMovebitsbetweendevicesSpecifiesvoltage,wirespeed,andpin-/TIA-232esstomediausingMACaddressErrordetectionnotcorrectionMovebitsbetweendevicesSpecifiesvoltage,wirespeed,andpin-outcablesProvidelogicaladdressingthatroutersuseforpathdetermination
ccna培训讲义 来自淘豆网www.taodocs.com转载请标明出处.