Revision

Revision

1. Registers

   • Program counter
     • Stores the address of the next instruction to be run.
   • Accumulator
     • Stores the intermediate results of a calculation.
   • Memory Address Register (MAR)
     • Stores the address where the data will be fetched/written.
   • Memory Data Register (MDR)
     • Stores the data or instruction which is being fetched from memory.

2. Clock Speed

   • the rate at which a processor can complete a processing cycle measured in megahertz or gigahertz.

3. RAM

   • Stores the programs , Parts of the OS and files being currently run

4. Cores

   • independent processors that carry out the fetch decode execute cycle

5. virtual memory

   • Used as a backup storage when RAM is all used up

6. Secondary storage

   • Secondary storage is non-volatile so the data is not deleted when the computer is turned off
   • magnetic storage devices, such as hard disk drives.
     • optical storage devices, such as CD, DVD and Blu-ray discs.
     • solid state storage devices, such as solid state drives and USB memory sticks.

7. LANS/WANS

   • A LAN is a network over a small geographical location
   • a WAN is a network over a large geographical location

8. Client server peer to peer

   • In Client-Server Network, Centralized server is used to store the data.
     • While in Peer-to-Peer Network, Each peer has its own data.