rachanabuch

data communication networking computer network wireless- lan types of connection cable fiber to the home ftth olt ont digital subscribar line dsl dial-up cable connection nodal delay propagation delay queuing delay transmission delay processing delay types of delay delay satellite channel wireless transmitters wlan co-axial cable fiber optic cable twisted pair cable un-guided media guided media protocols session layer application layer presentation layer network layer transport layer data link layer physical layer osi model fdm tdm time division multiplexing frequency division multiplexing packet circuit packet switching circuit switching