Data Communication

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Simple & easy free notes for learn to data communication.It almost cover all important topics which are given below

UNIT I Data Communication

 Introduction

 Components of Data Communication

 data representation

 data flow and basic model

 Serial & Parallel transmission

 Modes of data transmission

 Encoding

 Lossy & Lossless techniques

 Analog Versus Digital Transmission

UNIT 2 Multiplexing

 Multiplexing

 FDM

 TDM and WDM

 Synchronous TDM and Statistical TDM

 Spread spectrum

 Network Switching Techniques

UNIT 3 Physical Layer

 Physical Layer

 EIA-232-D

 RJ-45 and RJ-11

 EIA-449 digital Interface

 Modem and its Types

 Active and Passive Hubs

 Two & Three layer switches & Gateway

 Network Topologies

UNIT 4 Transmission Media

 Transmission line characteristics

 Twisted Pair

 Coaxial cables

 Fiber Optic Cable

 Electromagnetic polarization

 Rays and waves front

 Electromagnetic spectrum

 Propagation of Waves

 Inverse square law

 Wave attenuation and absorption

 Radio waves

 Infrared & Satellite Communication system

 Telephone Network

 ADSL, HDSL, SDSL, VDSL, Cable TV network

UNIT 5 Transmission Errors

 Transmission Errors

 Flow integrity error

 Error detection ,Error correction

 Bit error rate

 Error detection & Correction methods

 Other Errors Methods