UNIT 1:
Data Communication:
Introduction, Components, data representation Serial & Parallel transmission , Modes of data transmission, Line Encoding: Unipolar, Polar, Bipolar, Networks – Protocols and standards – Standards organizations – Line configurations – Topology – Transmission mode – Categories of networks – Inter networks.

UNIT 2:
OSI model:
Functions of the layers. Transmission media: Guided media – Unguided media – Transmission impairment – Performance. Switching Circuit switching , packet switching (virtual circuit and datagram approach), message switching

UNIT 3:
ERROR CONTROL AND DATA LINK PROTOCOLS
Error detection and correction: Types of errors – Detection – Vertical Redundancy Check (VRC) – Longitudinal Redundancy Check (LRC) – Cyclic Redundancy Check (CRC) – Check sum – Error Correction. Data Link Layer Protocols: Framing , HDLC, ARQ: Stop and Wait, Sliding Window. Efficiency

UNIT 4:
NETWORKS
LAN: Project 802 – Ethernet – Token bus – Token ring – FDDI. MAN: IEEE 802.6 (DQDB) – SMDS. X.25, FRAME RELAY, ATM AND SONET/, SDH

UNIT 5:
NETWORKING DEVICES AND TCP / IP PROTOCOL SUITE
Networking and internetworking devices: Repeaters – Bridges – Gateways – Other devices – Routing algorithms – Distance vector routing – Link state routing. TCP / IP protocol suite: Overview of TCP/IP.