Networks

Networks

1. Types of Networks

   • WAN
     • Wide area network
   • LAN
     • local area network

2. Disadvantages

   • Easy to hack all computers
   • Can have collisions slowing down the whole network
   • If the network shuts down then so will all the computers connected to it.
   • They are expensive to set up and create
   • You will need someone that knows how to set up a computer to set up a good, well-working network

3. Advantages

   • When you complete something on your account and log onto your account on a different computer it will save your progress
   • They are all connected to each other therefore being able to link to each other
   • Its easy to save progress on 1 computer and access it on another computer

4. Topologies

   • Ring Topology
     • Disadvantage
       • High chance of catastrophic failure
       • Difficult to expand
     • Advantage
       • Cheap and easy to install
       • No collisions (Fast)
   • Star Topology
     • Disadvantage
       • Expensive to install
       • Failure of the switch will take down the whole server
     • Advantage
       • Low chance of collisions
       • Easy to add new computers to
   • Bus Topology
     • Advantage
       • Cheap and easy to install
     • Disadvantage
       • An increased amount of collisons due to the design of the wires connecting all the computers
       • If the main wire breaks the whole network will break down

5. IP address

   • A unique value assigned to every device assigned to a network
   • An IP address is used to identify ever device on a network

6. Internet

   • The internet is a giant mesh of computers
   • There are multiple different routes between two nodes
   • Data is split into small chunks called packets
   • Each packet is sent along the lowest cost route

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