network

network

1. advantage

   • all computers on one network can be linked
   • all data can be shared between computers
   • you can share password so you dont have to change your password on every computer

2. disadvantage

   • it cost alot of money
     • a good price for a small buisness is 1-3k for one server
   • if there is malware on one computer it will be on every computer
   • you may need specilised skills to run a server

3. types of network

   • wan
     • this is a work wide network
     • people in a different conty can access it
   • lan
     • this is a local network
     • people in a local area can access it

4. topologies

   • Ring Topology
     • advantage
       • Fast (low chance of collisions)
       • Easy to add new computers
       • Low chance of catastrophic failure (a broken cable only takes out one computer, the rest of the network is fine)
     • disadvantage
       • Expensive (needs a lot of cabling, and a central switch, which is expensive)
       • Failure of the switch will take down the network
   • ring topology
     • disadvantage
       • High chance of catastrophic failure (if any cable breaks or any computer goes down, the entire network fails
       • Difficult to add new computers
     • advantage
       • Cheap to install (one cable per computer)
       • No collisions - only one computer is transmitting on each cable
   • us Topology
     • advantage
       • Cheap to install (only one wire needed)
     • disadvantage
       • High chance of catastrophic failure (a break in the central cable takes out the entire network)
       • High chance of collisions (multiple communications on the same cable that corrupt each other, slowing down the network)
       • More computers mean more collisions, so the network gets slower as it gets bigger

5. ip adress

   • The Internet is a huge network with more devices than it’s possible to assign a unique address to Unique addresses are assigned to businesses and houses These houses and businesses run their own mini-network inside with different IP Addresses
   • Globally, there are now more devices on the Internet than the 4’228’250’625 devices it’s possible to assign a unique address to
   • IP Addresses therefore range from 0.0.0.0 to 255.255.255.255
   • All messages that are sent over the network have both the sender and receiver’s IP addresses attached to them