Types of Network Computing

1. Centralized computing 

2. Client – Server computing 
3. Distributed computing

1.Centralized Computing

·                      In this method there is a centrally located server

·                      All other computers are connected to this server are client

·                     These clients connected to the server are known as dumb terminals because there are no resources present at client side like

          1.     Processor
          2.     RAM
          3.     Hard Disk
         4.     Operating System

·                     As there are no resources at client side processing is getting done at server side only

                                         

                                       

Disadvantages of Centralized Computing

When client increase to large number then

·                      Burden on the server increases and performance will decrease because every    client processing should be done at server only

·                      Data transfer in the network will increase so network will become slow

      To overcome these disadvantages client server computing is used.

2.Client server Computing:

     In this method client are connected to centrally located server similar to centralized computing but client are known as smart or intelligent terminals because every client contains all resources like

   1.     Processor

   2.     RAM

   3.     Hard Disk

   4.     Operating System etc.

     

      Clients need not depend on server for processing

    

           Client Server Computing

         Here  Clients Are : Smart terminals

  Advantage of Client Server Computing

   When clients increase to large number

·                     There doesn’t  be any burden on the web server

·                      There doesn’t  be any burden on network

      3. Distributed Computing

·                      In this method, the logic code of an application that is to be executed is divided    among many machines in the network, to complete the execution at faster rate and to provide the flexibility

         After completion of execution result will be integrated

                                 Distributed Computing

  

                              Here Clients are: - Smart/Intelligent Terminals

   

 Current Scenario Of Distributed Computing

·                     In this method servers are interconnected within the Internet/Network

·                      Current scenario of distributed computing speaks that once data is available within the server(s), it should be able to accessed and processed from any kind of client device like Computer, Laptop, Mobile Phone, ATM, PDA etc.

Types of NetWorks

In general .Net is used for network and internet computing so first we look into the different types of networks and network computing available in the IT field.

 Types of  Networks

  1. LAN (Local Area Network)

  2. MAN (Metropolitan Area Network)

  3. WAN (Wide Area Network)

 4.  EAN (Enterprise Area Network)

LAN

Network Limited to single organization located at single place is known as LAN

Ex: Network present in a bank, Network present in an organization, Network present  in an Office etc

MAN

Network   limited to a single city and its sub-urban places is known as MAN  

EX: cite cable Network 

WAN

  Network which has no limit in the universe is known as WAN        

  EX: Internet

EAN

There are two categories available in this Intranet, Extranet

Intranet: Network Limited to group of single organization located at places is intranet 

EX: Banking Network

Extranet: Network Limited to group of organization located at various places is known as extranet

EX: ATM Network