Networks

Networks

1. Topology

   • Ring
     • Advantages
       • Is a cheap set up
       • Data speed is continuous
     • Disadvantages
       • If one computer fails, all will fail
   • Bus
     • Advantages
       • It is easy to set up and extend
       • Is easy and requires less cable than the other methods
       • If one computer breaks the rest will still work
     • Disadavantages
       • Data speed is slow
       • If the main cable breaks all the network goes down
   • Star
     • Advantages
       • Doesn't stop when one computer or cable breaks.
       • Direct access to file server means faster access
     • Disadvantages
       • Can be very expensive to set up
       • If the file server fails all computers are affected

2. LAN and WAN

   • LAN or Local Area Networks
     • A network that covers a small geographical area e.g. a school network
   • WAN or Wide Area Networks
     • A network that covers a large geographical area. e.g. the internet

3. Advantages

   • You can share devices such as printers over a network
   • You can share information easily between computers
   • Software can be shared
   • Data can be shared easily
   • Allows for easy backup schedules

4. Disadvantages

   • The cost of cables and setting up a network can be high
   • Hackers may gain unauthorised access to files saved on the network
   • Sometimes a network fails to work properly which can cause havoc
   • Viruses can spread easily

Imagens e arquivos do mapa