Network

Network

1. types of network

   • WAN
     • wide Area network
   • LAN
     • local Area network

2. Networks facts .

   • Sharing files.
     • so the same files are available whichever computer you use.
   • Sharing resources.
     • such as printers and internet connection.
   • Sharing logins
     • So the same username and password can be used on every computer
   • cost.
     • Networks are expensive to set up
   • Difficulty.
     • Expertise is needed to setup and maintain a network
   • increased risk
     • problems such as viruses can affect every computer on the network

3. Network Addressing

   • IP Address
     • is a unique value assigned to every computer on a network, used to identify it
   • Messages
     • Messages on a network have an IP address attached, which is how a computer knows whether or not to keep the message
   • The Internet is a huge network with more devices than it’s possible to assign a unique address to
   • Unique addresses
     • Unique addresses are assigned to businesses and houses
   • houses and businesses
     • These houses and businesses run their own mini-network inside with different IP Addresses

4. The Internet

   • the internet.2
     • The Internet is a giant mesh of computers
       • A cost is assigned to each connection in a mesh
   • routes
     • There are multiple different routes between any two nodes
     • It is impossible to break the Internet, since another route can always be found
   • the route
     • Route-finding algorithms are used to find the lowest cost route between two nodes
   • Datea
     • Data is split into small chunks called packets
     • Each packet is sent along the lowest cost route