Computer networks are collection of computer hardware & software that are interconnected and therefore help users to work togather .It connects computers , printers , scanners & cameras. Using computer network , user can send electronic massages to each other.
Ex : The best example of computer network is Internet.
Use of computer networks :
❶ Resource sharing
❷ For providing high reliability
❸ To save money
❹ Provide a powerful communication medium
❺ to remote information
❻ Interactive entertainment
There are two types of computer network architectures :Such as –
❶ Client server network/model
❷ Peer to peer network /model
Client : The individual workstations in the network are called as clients.
Server :
The central computer which allows the client to access its software and
database is called as the server . server is more powerful than
clients.
Client server model :A client server model is a network in which the shared files and applications are stored in the server but network users ( client ) can still store files on their individual pcs.
Peer to peer ( P2P ) network :
P2P networks are defined as lack of central control over the network.There is no servers in p2p network. User simply share disk space & resources such as printer & faxes.
| Client server model | Peer to peer network |
Server has central ability while clients does not.
|
All computers have equal ability.
|
| Higher cabling cost | Cheaper cabling cost |
| It is used in small and large networks . | Normally used in small networks less than 10 computer |
| Easy to manage | Hard to manage |
| Install software in the server while the clients share the software . | Install software to every computer |
| One powerful computer acts as server | No server is needed. |
0 comments:
Post a Comment