Computing Revision

Computing Revision

1. Network

   • Client Server
     • You can log on to any computer with the same account
   • Peer to Peer
     • You need a different log in on each computer
   • Star Network
     • If one node breaks it doesn't effect the rest
     • Fast and easy to get the data packet out to the nodes
   • Ring Network
     • Cheap
     • If one node breaks the whole network cannot work
   • Bus Network
     • Only one data packet can travel alone the central wire at a time. So data transfers can be slow.
     • It can have as many nodes on the terminator as the user needs
       • But it will slow the network down

2. Software

   • Operating Systems
     • Security
     • User Interface
       • So the user can interact with the computer
     • Memory management
       • Deciding which programs are stored where
     • Multitasking
       • Being able to run several programs at the same time.
   • Off the self
     • Ready made
     • Not specific to your own criteria
       • But made to suit the needs of many
   • Custom Written
     • Specific to a certain criteria
     • Takes time for the software to be created
     • Hasn't been tested already
   • Open scorce
     • User is able to change the code
     • Often free
   • Proprietary
     • Cannot be edited without the creators permission
     • Have to pay
   • Utility Software
     • Anti Virus
       • Identifies viruses using a database of known viruses
       • Give the user a choice to wipe or quarantine the virus
       • Constant updates to find new viruses
     • Firewall
       • Blocks data flows
     • Disk Defragmentor
       • To get all of the seperated parts of the files and join them together so the computer doesn't have to find them and fix them back together, enhancing the preformance rate