NETWORK

NETWORK

1. ADVANTAGES

   • SHARE RESOURCES - such as printers and internet connection
   • SHARE FILES - the same files will be avaliable no matter which computer you use
   • SHARE LOGINS - so the same username and password can be used on every computer on the network

2. DISADVANTAGES

   • COST - Networks are expensive to set up
   • INCREASED RISK - Problems such as viruses can effect every computer in the network
   • DIFFICULTY - expertise is needed to set up and maintain a network

3. TYPES OF NETWORKS

   • LAN - Local Area Network
     • single orginisation
     • single geographical areas
   • WAN - Wide Aea Ntwork
     • multiple orginisations
     • multiple geographical areas

4. Topology

   • Bus
     • Cheap to install, can cause collitions
     • High chance of catastrophic failure
   • Ring
     • Cheap to install, no collisions
     • High chance of catastrophic Failure, difficult to add new devices
   • Star
     • Fast and low chance of collisions
     • Easy and quick to add devices
     • Extremely expensive to build and maintain

5. IP Address

   • It is a unique value assigned to every computer on a network
   • More than 4.2 billion combinations
   • Not enough unique IP addresses for every device
   • Houses and Businesses now have the same IP address

6. INTERNET

   • Giant mesh of computers
     • There are multiple different routes via nodes
   • Impossible to break the internet
     • Data is split into chunks called packets