Network

Network

1. Disadvantages

   • Viruses can spread through the network.
   • There is room for error because if somebody makes a mistake on one computer it makes a mistake on all of them.
   • It is hard to set up a network and it costs money.

2. Advantages

   • Computers can share files
   • They can share resources such as printers and internet connection
   • Wifi is connected to all computers

3. IP addresses

   • an IP address is a unique value assigned to every computer on a network, used to identify it.
   • IPV6 allows almost 80 octillion people to have unique IP adresses

4. Topology

   • Bus
     • cheap to install
     • computers connected in one straight line
     • high chance of catastrophic failure and collisions
   • Star
     • low chance of failure, no collisions
     • computers connected in a star
     • very expensive
   • Ring
     • Still a chance of catastrophe
     • cheap to install but difficult to add new computers
     • computers are connected in a ring

5. Internet

   • If any node becomes unavailable the message can simple take another route.
   • The internet is a giant mesh of computers. A cost is assigned to each connection in a mesh. Route finding algorithms are used to find the lowest cost route between two nodes.
   • All data in the internet is split into packets.

6. Types of networks

   • WAN: wide area network.
   • LAN:local area network.