Networks by kelly

Networks by kelly

1. What is a computer network?

   • Two or more computers, linked together, that share resources

2. Shared resources include

   • Hardware (printer and scanners)
   • software, only installed in one computer
   • Internet connection

3. Peer to peer network

   • Each computer has equal status on the network
   • computers share resources
   • suitable for small/home networks
   • Basic knowledge needed
   • more people use the network it slows down

4. Client- server networks

   • one more powerful computer called server
   • Programs are stored on the server
   • Network is totally dependent on the server.

5. Lans and wans

   • local area network
   • wide area networik
   • single building
   • different buildings

6. Ring

   • + easy to add devices
     • same access
   • - breaks, whole network fails

7. star

   • + fault tolerant
     • easy to add
   • - higher cost
     • dependence on router

8. Bus

   • + all devices are connected to a shared cable (backbone)/
   • - cost efficitive

9. Intranets and extranets

   • intranet- private network
   • extranet- allows other party access