Download Transmission Media

Presentation On Computer Network
Topic:-Transmission Media
Subtopic:-Guided Media
Unguided Media
Submitted to:Mr.Navdeep Bhandari
Submitted by:Daljeet Singh
Balwinder Kumar
Baljinder Singh
Amrinder Singh
Transmission Media
Introduction
Guided Media
Twisted Pair
Coaxial Cable
Optical Fiber
Unguided Media
Radiowaves Transmission
Microwave Transmission
Infrared Transmission
Laser Transmission
Satellite Transmission
Guided Media
Guided Media is that contain some conducting material to carry data or signal.
Many types of cable and wires fall under this category. Each of them has its
own characteristics like transmission speed, effects of noise.
Guided media is also known as wired media. In this we will use wires to send
our data from one place to other place. It include: - Twisted pair
Coaxial Cable
Optical fiber
Unguided Media
It does not contain the signal in some physical conductor
or metal. Rather, it transport electromagnetic signal
through air. It is also known as wireless media. Because
in this we are not using any king of cable. It includes: Radio waves
Micro waves
Infrared waves
Radio waves Transmission
•The Radio waves have frequencies between 3khz and1Ghz
•Radio waves are Omni direction
•Radio waves can penetrate buildings easily, so that are widely use for
communication both indoors outdoors.
•They also absorbed by rains
•At high frequency, radio wave tends to travel in straight line and bounces off
the obstacles.
Micro waves Transmission
•Micro waves electromagnetic waves having frequency between 1 GHZ and
300 GHZ.
•There are two types of micro waves data communication system : terrestrial
and satellite
•Micro waves are widely used for one to one communication between sender
and receiver, cellular phone, satellite networks and in wireless LANs.
Infrared Waves
•Electromagnetic waves having frequencies from 300 GHz to 400 THz are
called IR waves or Infrared waves.
•IR waves are used for short range communication and use line of sight
propagation.
•Infrared waves cannot pass through solid objects, like walls and be easily
contained in a room.
•They are cheap, easy to build and do not require any government license to
use them.
•IR waves offer very bandwidth for use.
Laser Transmission
•This type of transmission use thin laser to transfer data up to few kilometers.
•Laser beams are unidirectional, therefore this type of transmission system use
line of sight propagation.
•In such a transmission system, a photo detector and laser is set on both
sender and receiver side.
•Such a system offer very high band width at a very low cost.
•Other disadvantage is that on hot sunny days these waves are affected by hot
turbulent air and miss the detector.
•The major problem in this transmission system is that laser beams cannot
penetrate rain or thick fog.