operating system/Building PC

operating system/Building PC

1. Purpose of the operating system

   • The operating system manages certain aspects of the computer so the users doesn't have to,it can have a graphical interface (GUI) and/or a command line interface (CLUI)

2. Building PC

   • Keywords
     • RAM
       • Random Access Memory
         • Ram allows data to be read and written.
     • Optical Drive
       • Memory stick
       • CD's
       • DVD's
       • It uses laser to read data on a CD or DVD
     • ROM
       • Read Only Memory
         • It contains instructions that the computer to uses to boot up
     • mother board
       • Allows different components to commmunicate with each other.
     • Hard Drive
       • Is what stores all of your data( files and folders).
     • CMOS batery
       • The battery that sets the time and date on the computer and when you take it out it goes back to defult
     • Input Devices
       • Mouse
       • Keyboard
       • Microphone
     • output Devices
       • moniter
       • Printer
       • Speakers

3. Utility Software

   • Anti-Virus
     • Finds and quarantines virus in the computer the user then gets the choice on whether they want to delete it or not
   • Disk Fragmenter
   • Firewall
   • Automatic updates

4. Network topolohgies

   • ring network
     • Sends one data packet one way round to the correct nodes. However it cannot go the opposite way in a ring network.
       • The ring nwtwork is the cheeper and easiest to set up out of the three networks.
     • If one nodes is removed from the network then the whole network will break down because it cant pass the gap between the node that is broken.

5. Network topologies

   • Bus network
     • Advantages
       • If one node breaks the system will still work as if the node didn't break
     • Disadvantages

6. Custom Written

   • Advantages
     • If there is any bugs with it the user can tell the people who made it that there is something wrong with it.
     • It is designed only for the people who want it.
   • Disadvantages
     • Really expensive
     • Takes time to make because you have to make sure that it is working properly before they can give it to the person who wants it.