Teleprocesses Telecommunication Equipment Standard Interfaces The Parallel Port handshaking The Parallel Port Hardware RS-449 Transmission Media The cables Twisted Pair Cable Coaxial cable Optical fiber Connector types Data Encryption Digital data Digital signals Digital data Analog signals Analog Data Digital Signals Analog Data Analog Signals Spread Spectrum Data Communication The interface Asynchronous Transmission Line Configuration Wireless Transmissions The Telephone System Introduction Historical review Alternative Transmission Deteriorations Multiplexing Multiplexers Frequency Division Multiplexing Time Division Multiplexing Statistical Multiplexing Commutation Circuit Switching Packet Switching Reference Models OSI Reference Model TCP/IP Reference Model OSI-TCP/IP Comparison OSI model The Physical Layer The Link Layer The Network Layer The Transport Layer The Session Layer The Presentation Layer The Application Layer Local Area Networks Applications Architecture LAN on Bus Ring LAN LAN on Star Wireless LAN Bridges Modern technology networking Dedicated Links FireWall