Faculty of computer engineering information security direction

Power Supply and Cooling Fan
The power supply is used to give power to all the hardware components on your computer system.The computer takes energy from your home electrical system and converts 110 to 120 volts AC power to lower DC voltages.The power supply contains one of the cooling fans that keep the inside of the computer case cool.
16 The Central Processing Unit: The Microprocessor
CPUCPU socketCentral processing unit (CPU) – A microprocessor that interprets and carries out instructions given by software. It controls the computer’s components.
17 MemoryMemory is the term used to describe devices that enable the computer to retain information. Program instructions and data are stored in memory chips for quick access by the CPU.Read-Only Memory (ROM)Hard DriveRandom Access Memory (RAM)Blue Ray and commercial music CDFlash Memory17
18 Hard DriveThe Hard Drive is the main storage component on your computer that holds your data files.Typically holds LARGE amounts of information—250 GB to 3+ TB.These files include the data used to start your operating system. A hard drive consists of round platters made of aluminum, ceramic or glass.The platters are coated with an alloy material which read/writes record information on magnetically
19 Read-Only Memory (ROM)
Most often associated with the Hard Drive.ROM is defined as – A computer memory that does not need to be changed, such as permanent parts of the operating system. –Dictionary of Computer and Internet Terms (ninth edition) by Douglas Downing, Ph.D.When you turn on the computer it loads up from read-only memory (ROM).Compact Disk Read-Only Memory - CD-ROMAn optical disk containing computer data (like an audio compact disk). CD-ROMs can only be read not recorded on. -Dictionary of Computer and Internet Terms (ninth edition) by Douglas Downing, Ph.D.
20 Random Access Memory (RAM)
Random Access Memory (RAM) is a type of memory that stores information temporarily so that it’s available to the CPU. Typically, RAM will be measured as 2-12 GB.The more programs open, the slower the computer runs because more RAM is being used and less is available.RAM is volatile; the memory’s contents are erased when the power is turned off.Laptops in standby mode keep power to the RAM so the laptop can wakeup and be ready to go without having to boot and load the operating system.20
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