Networks

Networks

1. LAN

   • Local area network
   • a network that links people in a small geographical location
   • may somtimes be apart of a wan
   • a school or local buisness may use lan

2. Advantages

   • it is conveniant for a company to have a network to connect their workers
   • reasources such as printers can be shared
   • files can be easily shared

3. WAN

   • wide area network
   • a company can connect lots of people in a big area
   • may use lots of lans connected
   • a network over a big area e.g. contry or the whole world

4. disadvantages

   • a virus can spread to a whole network if one conputer is infected
   • requires lots of money and experties
   • If one peice of softwear or hardwear breaks it could afect the whole system

5. Bus

   • All of the clients are connected on one straight lign
   • advantages
     • its cheap because it is only one wire
   • Disadvantages
     • There are lots of colisions
     • It is slow

6. Ring

   • All of the clients are linked in a ring
   • comunication runs in one direction
   • advantages
     • No collisions
   • Disadvantages
     • The entire system will stop working if 1 clients breaks
     • Expensive
     • quite slow

7. Star

   • All clients are branches out of a central hub
   • Advantages
     • Fast as the data doesnt need to pass through other clients just the one central hub
     • No collisions
     • Fast
   • disadvantages
     • Expensive

8. IP Adress

   • AN IP adress is used to tell a computer where to send info
   • There is only limited IP adresses in the world so networks use internal adresses
   • 0-255 in each set of 4 numbers so only 4 billion ip adresses

9. Mesh

   • In mesh topology each device is conected to at least 2 others
   • Advantages
     • No chance of catastrophic failier

10. Internet

    • The internet is a mesh topology
    • The internet is a set of wires that connects the whole world

Bilder und Dateien der Mindmap