BASIC CONCEPT
 NETWORK ARCHITECTURE
 NETWORK TOPOLOGY

WHAT IS BASIC CONCEPT OF NETWORK??

DEFINTION: 
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.


COMPUTERS NETWORKS USAGE :
  • Sharing internet connection among several users.
  • Sharing application software, printers and other resources.
  • Exchanging files among network users and over the Internet.
COMMUNICATION DEVICE
-HARDWARE COMPONENT THAT ENABLES A COMPUTER 
TO SEND AND RECEIVE DATA, INSTRUCTIONS, INFORMATIONS TO
AND FROM ONE OR MORE COMPUTERS
EXAMPLES
FUNCTION
MODEM
DEVICE THAT ENABLES A COMPTER TO COMMUNICATE OVER ANALOG NETWORKING MEDIA
ROUTER
DEVICE THAT CONNECT MULTIPLE NETWORK TOGETHER
HUB 
DEVICE THAT PROVIDES COMMON CENTRAL CONNECTION POINT FOR NODES ON NETWORK
SWITCH
DEVICE USED TO CONNECT MULTIPLE DEVICES ON A SINGLE NETWORK
NETWORK INTERFACE CARD
AN ADAPTER CARD THAT CONNECT A COMPUTER TO A NETWORK

TRANSMISSION MEDIA : THE MATERIALS OR SUBSTANCE CAPABLE OF CARRYING ONE OR MORE SIGNALS
PHYSICAL: SEND SIGNALS THROUGH CABLE, WIRE OR TANGIBLE MATERIALS
COAXIAL CABLE
FIBER OPTIC
WIRELESS: SEND SIGNALS THROUGH THE AIR OR SPACE
INFRARED
MICROWAVES