What we have learnt

What we have learnt

1. Networks(advantages)

   • You can share files so the same files are availble whichever computer you use
   • Share resorces such as printers and the internet connection

2. Networks(disadvantages)

   • It could get hacked
   • It is slow
   • It is expensive
   • More room for error
   • malware

3. Lan

   • Stands for Local area network
   • A network contained in a single geographical location

4. Wan

   • Stands for Wide area network
   • A network that spans a large geographical area

5. Network Topolgies

   • Bus
     • Advantages
       • Cheap
       • Easy to set up
     • Disadvantages
       • Catastrophic failure
       • Data collisitions
       • Slower the more computers you add
   • Ring
     • Advantages
       • Cheap
       • Easy to set up
       • No collitions
     • Disadvantages
       • Catastrophic failure
       • Machine is turned off
       • Slow
   • Star
     • Adavntages
       • Easy to expand
       • Fast
       • No data collitions
     • Disadvantages
       • Catastrophic failure
       • Expensive

6. IP Addresses

   • An IP address is a unique number given to something
   • A house address(such as 15 High Street ,Townthing) This is an exaple of an address
   • Messages and network have an IP address attached which is how a computer knows weather or not to keep the message
   • Globally, there are now more devices on the internet then the 4,228,250,625 devices

7. The Internet

   • The internet is a huge global inter-connected network
   • Rather then using star, bus or ring topology, each node is connected to one or more other node in an ad-hoc manner
   • The layout of these nodes is called a mesh Topology
   • In a mesh topology, there is excellent resilience to outages as messages can destination
   • If any node or connection becomes unavailable, the message can simply take a different route
   • The internet is a giant mesh of computers
   • There are multiply different routes between any 2 nodes
   • It is important to break the internet, since another route can always be found