networks

networks

1. disadvantages

   • if one computer gets a virus, then all of the computers in the network get a virous
     • Dangers of hacking have the same effect
       • Information can be shared in the network, including sensitive information
     • if one computer in the network fails, it renders the entire network useless
   • Pricing for cables and software costs a lot
     • as well as cost, managing the network requires training

2. advantages

   • information can be shared easily, and faster
     • softWare only has to be bought and downloaded once, and then it can be used on all computers in the network
       • everything has to be done only once
   • log onto any computer and you can access any files
     • its reliable, as no information can be lost or stolen

3. network types

   • WAN
     • a wide area network, often of a large geographical location/organisation or of lots of little LANs connected
   • LAN
     • a local area network, of a single geographical location or organisation
   • IP Address
     • a unique set of numbers from 0 to 255 that are assigned to a computer in s network, for example, 1.4.234.29

4. topologies

   • bus
     • disadvantages
       • high chance of failure, because if one breaks it could result in the entire network going down
         • wireless
           • disadvantages
             • wifi networks have a limited range
           • advantages
             • users can be moved around easily and still be connected
       • high chance of collisions, because information may collide and make it slower
       • the bigger it is the slower it is
     • advantages
       • its cheap to install
         • pan
           • advantages
             • convenient
           • disadvatages
             • slow data rates
   • ring
     • disadvantages
       • there is a higher chance of failure, because it one computer goes odwn,the entire network is rendered useless
       • it is difficult to add new computers to the network
     • advantages
       • there will be no collisions, as the cable is in the round, so there will be a single directions for information
       • its cheap, because there is only one cable for each computer
   • star
     • advantages
       • if one computer in the network goes down, the other computer can continue being in use with breaking, as everything goes through the router
         • mesh
           • disadvantages
             • a lot of maintenance
           • advantages
             • messages can be received quickly
     • disadvantages
       • if the switch is broken, the entire network is rendered useless