system architecture

system architecture

1. Architecture of the CPU

   • purpuse of the cpu
     • it processes all the data and instructions that make the system work
     • the cpu is the brain of the computer system
   • Common CPU components and their function:
     • ALU (Arithmetic Logic Unit)
       • does all the calculations
       • does simple addition subtraction multiplication division and compares the size of numbers
       • contains an accumulator register
         • register
           • holds
       • preforms operations such as AND OR and NOT
     • CU (Control Unit)
       • manage the fetching, decoding and executing of program instructions
       • it controls the flow of data inside the cpu
     • Cache
     • registers
   • Von Neumann architecture:
     • MAR (Memory Address Register)
     • MDR (Memory Data Register)
     • Program Counter
     • Accumulator

2. CPU performance

3. GCSE Computer Science

   • Wired and wireless networks, protocols and layers
     • protocols

4. GCSE Computer Science

   • Wired and wireless networks, protocols and layers
     • protocols
       • FTP
         • Transmitting a file from a client to a server
       • HTTP(S)
       • IMPA/POP3
         • Download mail to your computer
       • SMTP