DATA COMMUNICATION

Layer Models and Signals Layered tasks : Sender, Receiver, and Carrier, Hierarchy. The OSI model : Layered architecture, Peer-to-peer processes, Encapsulation layers in the OSI model. TCP/IP Protocol Suite Addressing : Physical and logical addresses, Port addresses, Specific addresses. Analog and digital : Analog and digital data, Analog and digital signals, Periodic and Nonperiodic signal. Periodic analog signals