Networks

Networks

1. Network allow computers to

   • Share files
   • Share resources
   • Share logins

2. Disadvantages of networks

   • Cost
   • Increased risk
   • Difficulty

3. Topologies

   • Star Topology
     • Star toplogy advantages
       • Low chance of failure. No collisions (fast)
     • Star topology disadvantages
       • Expensive
       • Depends on a switch
   • Ring Topology
     • Ring topology adavantages
       • Cheap to install. No collisions (fast)
     • Ring topology disadvantages
       • High chance of catastrophic failure
       • Difficult to expand
   • Bus Topology
     • Bus toplogy advantages
       • Cheap to install
     • Bus topology disadvantages
       • High chance of catastophic failure
       • Lots of collisions
       • Slows down as more computers are added

4. IP Address

   • A unique value assigned to every computer on a network
     • My IP Adrdress is 86.188.242.210
   • Messages on a network have an IP Address attached
     • Unique addresses are assigned to businesses and houses

5. Types of networks

   • LAN
     • Local Area Network
       • A network in a small area or single organisations
   • WAN
     • Wide Area Network
       • A network that spans a large area or multiple organisations

6. Internet

   • Find the lowest cost route between two nodes
     • The route that adds up to the lowest number
   • Packets are sent along the routes
     • They are re-assembled at the other side

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