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 user doesn't have to, it can have a graphical user interface(GUI) and/or a command line interface(CLI).

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.
   • Automatic Updater
     • Searches the internet for updates that your software requires then requests the user to update them.
   • Firewalls
     • Firewalls open and close ports and ask

4. Network Topologies

   • Ring network
     • Sends data packets one way round to their appropriate nodes however it cannot send packets the opposite way in a ring network.
       • The ring network is cheaper and easiest to set up out of the three.
     • If one node is removed from the network then the whole network breaks because the data can't pass the gap between the nodes.
   • Bus Network
     • Bus networks can send packets to their appropriate nodes through a central wire. Node can easily be added and removed from the network.