11Which OSI layer deals with bits, voltages and cables?AData link layerBNetwork layerCTransport layerDPhysical layerView AnswerDiscussWorkspaceReportSaveEasy
12Adding headers as data passes down the layers is called:AEncapsulationBFragmentationCDecapsulationDRoutingView AnswerDiscussWorkspaceReportSaveEasy
13Which layer is closest to the end user?AApplication layerBNetwork layerCPhysical layerDTransport layerView AnswerDiscussWorkspaceReportSaveEasy
14Which OSI layer frames data and detects errors on a single link?APhysical layerBSession layerCNetwork layerDData link layerView AnswerDiscussWorkspaceReportSaveEasy
15Port numbers are used at which OSI layer?AData link layerBPhysical layerCNetwork layerDTransport layerView AnswerDiscussWorkspaceReportSaveEasy