IT 10103 Introduction to Information Technology. The Internet & World Wide Web Began in 1969 with...
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Transcript of IT 10103 Introduction to Information Technology. The Internet & World Wide Web Began in 1969 with...
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IT 10103Introduction to Information Technology
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The Internet & World Wide WebBegan in 1969 with the ARPANET(Advanced Research Project Agency Network)
ARPANET3 Goals:Communication between scientists & universitiesMilitary & Government CommunicationsNuclear Proof
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The InternetWhat is the Internet?
A World-Wide Collection of Networks (Servers)
The Hardware Part of the Network
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The InternetHow do we communicate on the Internet?
IP (Internet Protocol) Addressesxxx.xxx.xxx.xxx
Example: 206.21.59.35
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The InternetHow do we connect to the Internet?
Modem (MODdulate/DEModulate)
Analog DeviceConnects through the Phone System (POTS)Limited to 56kbps speeds (56,000 bits per second)
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The InternetHow do we connect to the Internet contd?
Network Interface Card (NIC)&Digital Modems (Routers)
DSL (Digital Subscriber Line)CableSatelliteISDN (Integrated Signal Digital Network)
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The InternetHow do we get to our websites?
DNS (Domain Name Services) through aDomain Name Server (DNS Server)
Example:www.rio.edu or206.21.59.35
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World Wide WebWhat is the World Wide Web (www)?
The World-Wide Collection of Documents that reside on the Internet (Servers)
The Software Part of the Network
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World Wide WebHow do we use the www?
Web Browser SoftwareFirefoxInternet ExplorerOperaNetscapeEtc.
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World Wide WebHow are documents made on the www?
HTML (Hyper-Text Markup Language)
All web documents are created using the HTML programming language
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World Wide WebHow do we find documents on the www?
Web Address:
http://www.rio.edu/StudentLife/Default.htmHyper-Text Transfer ProtocolDomain NamePathDocument
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World Wide WebThe HTML Programming Language
Very easy to learn and forms the basis for all web documents
HTML describes how a page should be formatted.
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The WebHow does the Web work?The web is a collection of networks, starting near your home or office and expanding until we reach the global network
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The WebHow does the Web work?We type in a URL (Uniform Resource Locator) of a page and our Web Browser contacts the computer (web server) where that address is located (stored).
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The WebHow does the Web work?The Web Server receives your request and then sends the documents back to us by breaking them into pieces we call Packets
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The WebHow does the Web work?Packets wander the internet (network) until they finally end up at our computer to be displayed on our computer monitorsPackets can be re-routed if there is a breakdown on the path they are traveling or if there is congestion as well
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The WebHow Fast is the Web?The time needed to download something on the web is determined by four factors:The size of the web pageThe speed of the users internet connectionThe speed of the web serverThe amount of traffic competing for use of the internet
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The WebHow Fast is the Web?The users internet connection is usually the slowest of these fourImproving a users internet connection speed will speed up access to the web the most
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Internet & WWWWhat makes all of this work?
A Network ProtocolTCP/IPTransfer Control Protocol/Internet Protocol
Allows communication between the Internet Servers and the Web Browsers on Client computers
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Internet & WWWWhat is the most used part of the Internet?
E-Mail(Electronic Mail)
Billions of messages are transferred each day
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Internet & WWWWhy do I care about all of this?Answers:We are in IT 10103 Prof.Dah!We want to Pass this CourseWe like to Strain our BrainsI Paids my Muney, so I wants my Edumakation
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Internet & WWWQUESTIONS?
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Internet & WWWAssignment 01Page 129Research Web Exercise #2