Networks 3.0

Networks 3.0

1. Disadvantages

   • viruses can make you lose doccuments and other importanr stuff
     • Its very expensive to set up and maintain
   • You can be hacked and lose safety on your copmuter and in your home

2. Advantages

   • You can print from printers and find other connections
   • You can log into your account from other computers with same user and password
   • You can share and save documments

3. Types of networks

   • WAN wide are network
   • LAN local area network

4. Topologies

   • ring topologie
     • disadvantages
       • high chance of catastrophic failure
       • difficult to expand
     • advantages
       • fast
       • cheap
   • star topologie
     • advantages
       • low chance of failure
       • fast
     • disadvantages
       • expensive
       • needs a switch
   • bus topologie
     • advantages
       • cheap
     • disadvantages
       • slows down as more computers are added
       • lots of collisions
       • high chance of catastrophic failure

5. Internet is a giant mesh of computers

   • Its immposible to break the internet since more routes are available
   • There are multiple routes between nodes
     • packets are re-assembled on the other side
   • Cost is assigned to each mesh
   • Route algorithms are used to find lowest cost betwwen route nodes
     • DATA is split in chunks
     • all packet are sent on low cost routes