Data Communication

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