Computer and Support

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Computer and Support

Hardware Components of a TypicalComputer -- CPUPeripheralDevicesCentralProcessingUnit (CPU)MemoryCentral Processing Unit (CPU)performs the basic operationsconsists of two parts:Arithmetic / Logic Unit (ALU) - data manipulationControl Unit - coordinate machine’s activities


Hardware Components of a TypicalComputer -- MemoryPeripheralDevicesCentralProcessingUnit (CPU)MemoryMain Memoryholds programs and datastores bits in fixed-sized chunks: “word” (8, 16, 32, or 64bits)each word is stored in a cell, which has a unique addressthe cells can be accessed in any order =>random-access memory or “RAM”


Hardware Components of a TypicalComputer -- MemoryA bit: 0 or 1A word: chunk of bits (8, 16, 32 or 64 bits)a byte = 8 bitsa kilobyte = 2 10 bytes = 1024 bytesa megabyte = 1024 KB = 2 20 bytes = 1,048,576 bytesa gigabyte = 1024 MB = 2 30 bytesa terabyte = 1024 GB = 2 40 bytes


Hardware Components of a Typical Computer –Peripheral Devices that Store Data Long TermSecondary (mass) storageStores information for long periods of time as filesExamples: hard drive, floppy disk, tape, CD-ROM(Compact Disk Read-Only Memory)


Features of Computers -- ReliabilityFactors that affect reliability:heat, ventilation, “over-clocking”, power surgesMost system failures are due tosoftware flaws rather than hardware


Modes of communicationParallel communication:all the bits are transferred at the same timeeach bit on a separate lineSerial communication:one bit at a time10110001


Modems (MOdulator-DEModulator)RemoteComputerHomeComputerDigitalDataDigitalDataModemModemAudio signalphone lines


Computer Networks – Method ofCommunicationEach computer has an addressExample: IP address of www.fisika.ui.ac.id is152.118.167.2A sender computer transmits data through the network inpackets; each packet is tagged with the destination andreturn addressWhen data is too big to fit in one packet, the sendercomputer can split the data into several packets, labeledin sequence


Computer Networks – Method ofCommunication (cont)The packets are sent via links from computer to computer(“routing”)Each intermediate computer receives and retransmits themessage (“hops”)The packets do not necessarily arrive in the order inwhich they were sentThe recipient computer puts the packets in correct sequenceand retrieves the data


Computer and SupportJaringan Komputer LAN / WLAN


Computer and SupportSistem Input Data


Computer and SupportSistem Pemroses Data


Computer and SupportSistem Output Data


Computer and SupportSistem Penyimpan Data


Computer and SupportFiber Optic Communication


Technology Information Todaywireless communication


What is programming?A computer program tells a computer, in very detail, thesequence of steps that are needed to fulfill a task.The act of designing and implementing these programs iscalled computer programming.Programmers develop computer programs to makecomputers perform new tasks.A professional computer scientist or software engineer doesa great deal of programming.The activity of programming is an important part of science


What is Algorithm?eureka!Algorithm:A set of instructions describinghow to do a task (or process)Program: C++


Computer and SupportSoftware: Aplikasi


Computer and SupportSoftware: Development


Computer ProductMultimedia


Computer Productsms, w@p, gprs communication


Computer ProductSistem Control berbasis Web

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