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SYLLABUS

UNIT-I

Introduction: Data Communication Components, Line Configuration, Topologies, Transmission Mode, Categories of Networks, ISO Reference Model – Layered Architecture, Functions of Layers, TCP/IP Reference Model. Transmission Media: Guided Media – Twisted Pair Cable, Coaxial Cable, Optical Fiber, Unguided Media – Satellite Communication and Cellular Telephony. Multiplexing: Frequency Division Multiplexing, Time Division Multiplexing.

UNIT-II

Data Link Layer: Error Detection – VRC, LRC, CRC, Checksum, Error Correction – Hamming Code, Burst Error Correction, Line Discipline – ENQ/ACK, Poll/Select, Flow Control – Stop-and-Wait, Sliding Window, Error Control – Stop-and-Wait ARQ, Sliding Window ARQ, Go-Back-n ARQ, Selective-Reject ARQ. Local Area Networks: Introduction to IEEE 802, Ethernet – CSMA/CD, Implementation, Token Ring – Token Passing, Implementation. Switching: Circuit Switching, Packet Switching, Message Switching.

UNIT-III

Networking and Internetworking Devices: Repeaters, Bridges, Routers, Gateways, Brouters, Switches, Distance Vector Routing Algorithm, Link State Routing Algorithm. Transport Layer: Duties of Transport Layer, Connection. Upper OSI Layers: Session Layer, Presentation Layer, Application Layer.