Lec10_Networking

Lec10_Networking - ISOM 101: Introduction to Information...

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ISOM 101: Introduction to Information Systems Lecture 9: Technical Foundations Lecture 10: Network Technologies Prof. Heather H. Xu
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Part I: Hardware & Software
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Web 2.0 Module #2 Fundamentals of IS 1. Components of IS 2. hardware/software/network 3. The Internet Technical Foundations Internet/WWW Network Technologies
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Primary Storage Cache memory Internal – ultra high speed and very expensive • Integrated in CPU External – very high speed and less expensive • Integrated in RAM Small, fast, and expensive • Stores data for immediate use NOT part of your computer Web Cache Reduce transmit across the network Improve responsiveness of webpage
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Secondary Storage Non-volatile Outside the CPU and primary storage Use magnetic or optical technology
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Secondary Storage Magnetic storage • Sequential access • Direct access
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Secondary Storage SSD — solid state drive
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Data Storage Units Q: Why is Megabyte>1,000,000 bytes?
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Store in the cloud Your gmail http://techcrunch.com/2011/02/28/gmail-failure- 2011/
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Secondary Storage Optical Disk • CD (700 MB) • DVD (4.7 – 17 GB) • Blu-Ray (50 GB – 400 GB)
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Computer Storage RAM/ROM /CACHE Magnetic Disk Optical Disk Primary Storage Secondary Storage
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How to put everything together?
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BUS Data highway Transfer data between computer components inside a computer
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So this is a PC, what about others?
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Types of Computers Supercomputers Mainframes Minicomputers Workstations Desktop computers Notebook computers (laptops) Handheld computers (PDAs) Ultra-portable, SmartPhones, TabletPC, ToughBook, etc… iPad, iPhone, Kindle
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Types of Computers Supercomputers : For extremely fast and complex computations (multiple powerful CPUs) Focus on computation power Weather forecasting, modeling nuclear explosions, designing new drugs, processing DNA structures Mainframes : Large computer with massive memory for large organizations (e.g. banks) Emphasis on reliability, security, and capability to serve a large number of users Users interact with the mainframe through local input devices, called ―dummy‖ terminals • Keyboard and monitor • ATM
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Types of Computers Mini-computers (mid-range computers): used for small to medium size organizations (scaled down versions of mainframes) Opened an era of decentralized computing: customized to the specific needs of individual departments Being substituted by personal computers or workstations Workstations : Used for special purposes that need powerful graphics or computational capabilities computer-aided design, modeling stock market movements High-end PC
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Types of Computers Desktop computers Notebook computers (laptops) Handheld computers (PDAs)
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iPad 2 is out!!
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Computer is a bicycle for the mind
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What is software? Software
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This note was uploaded on 07/30/2011 for the course ISM 101 taught by Professor Lily during the Spring '11 term at HKU.

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Lec10_Networking - ISOM 101: Introduction to Information...

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