NETWORKS

NETWORKS

1. DISADVANTAGES

   • DIFFICULTY
     • expertise is essential for setting up and maintaining a network
   • COST
     • networks are very expensive to set up
   • INCREASED RISK
     • problems such as viruses can affect every computer on one network

2. TYPES OF NETWORKS

   • LAN
     • local area network
       • smaller than WAN
   • WAN
     • wide area network
       • larger than LAN

3. ADVANTAGES

   • EASIER TO SHARE AND BLOCK UNWANTED INFO
   • SHARE RESOURCES SUCH AS PRINTERS AND SCANNERS
   • SHARE LOGINS

4. TOPOLOGIES

   • bus
     • advantages
       • cheap and easy to install
     • disadvantages
       • high chance of catastrophic failure
       • lots of collisions
       • slows down when more computers are added
   • star
     • advantages
       • low chance of failure
       • no collisions
     • disadvantages
       • expensive to install
       • all depends on a single switch to work
   • ring
     • advantages
       • cheap to install
       • no collisions
     • disadvantages
       • hight chance of catastrophic failure
       • difficult to expand

5. IP adress

   • a unique value assigned to every computer on a network,used to identify it.

6. INTERNET

   • the internet is a giant mesh of computers
     • data is split into small chunks called packets
       • each packet is sent along the lowest costing route
       • the packets are re-assembled on the other side
   • it is impossible to break the internet because there is always another route