Computer Science

Computer Science

1. Parts of the CPU

   • ALU
   • CU
     • The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor.
   • Registers
   • Cache

2. RAM

   • Alternatively referred to as main memory, primary memory, or system memory, Random Access Memory (RAM) is a hardware device that allows information to be stored and retrieved on a computer.

3. ROM

   • Short for Read-Only Memory, ROM is a storage medium that is used with computers and other electronic devices.

4. Types of Storage

   • Optical
   • Magnetic
     • Magnetic storage is the manipulation of magnetic fields on a medium in order to record audio, video or other data.
   • Flash
     • Flash storage is any type of drive, repository or system that uses flash memory to keep data for an extended period of time. Flash memory is ubiquitous in small computing devices and increasingly common in large business storage systems.

5. Network Layers

   • Data Link
   • Application
   • Transport
   • Network

6. Partial Mesh Topology

7. Full Mesh Topology

   • A mesh is when devices are connected with many redundant interconnections between network nodes.

8. Star Topology

9. Network security

   • Virtual Networks
     • It is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
   • DoS attaks
     • A DoS attack is when too much data comes in at once and the whole system crashes!