computer science revision

computer science revision

1. 1.1:computer architecture

   • key words
     • peripheral: a peripheral device is an auxiliary device such as a computer mouse or keyboard that connects and works with the computer in some way
     • input peripheral: a device that may be connected to a computer system. they are used to bring data from physical world into a computer system
     • output peripheral: Output peripheral A device that may be connected to a computer system. They are used to bring data from the computer into the physical world. EG A monitor or speakers
     • storage peripheral: Storage peripheral A device which is used to store data & files on. EG CD, Memory stick
     • bios:Basic Input Output System. A small program is stored on this ROM chip to load the operating system correctly
     • CMOS battery:Small battery used to keep track of the time when a computer is switched of
     • CPU:Central Processing Unit. The device used to control and CPU execute commands within the computer. The performance is measured in GHz, which is the number of processes which can be executed in 1 second
     • GPU:Graphics Processing Unit. Used for processing of graphics, particularly used by gamers and graphic designers

2. 1.2:memory

3. 1.3:storage

4. 1.4:wired and wireless networks

5. 1.5:network topology

6. 1.6:system security

7. 1.7:system storage

8. 1.8:ethical,legal culture and environmental issues