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The Internet and
World Wide Web
Chapter two
http://www.aiet.edu.eg/StudentArea.asp
Summary of the Internet and World Wide Web
History and structure of the InternetHistory and structure of the Internet
The World Wide WebThe World Wide Web
Web PublishingWeb Publishing
Electronic commerceElectronic commerce
Other Internet servicesOther Internet services
Explain how to access andconnect to the Internet
Explain how to access andconnect to the Internet
Analyze an IP addressAnalyze an IP address
The InternetWhat are some services found on the InternetInternet?
The InternetHow did the Internet originate?
Goal:To function if
part of network were disabled
Became functional
September 1969
Goal:To allow scientists
at different locations to share
information
The InternetHow has the Internet grown?
TodayMore than 500 million computer linked hosts
1984More than 1,000 hosts
1969Four hosts
History of the Internet•Who controls the Internet?
No onec—cit is a public, cooperative, andindependent network
Several organizations set standards
Evolution of the Internet
Each organization is responsible only for maintaining its own networkInternet2 connects more than 200 universities and 115 companies via a high-speed private network
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How the Internet Works
Many home and small business users connect to the Internet via high-speed broadband Internet service
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How can you connect to the Internet?
How the Internet Works
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What are ways to access the internet?
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How the internet works
How the internet worksAn IP address is a number that uniquely identifies each computer or device connected to the InternetA domain name is the text version of an internet protocol (IP )address.Top-level domain (TLD)
A DNS server translates the domain name into its associated IP address
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How the Internet works
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The World Wide Web
The World Wide Web, or Web, consists of a worldwide collection of electronic documents (Web pages)A Web site is a collection of related Web pages and associated itemsA Web server is a computer that delivers requested Web pages to your computerWeb 2.0 refers to Web sites that provide a means for users to interact, allow users to modify web site content, and have application software built into the site for visitors to use e.g (e-mail and word (processing programs
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The world wide web
Program that allows you to view Web pages
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What is a web browser?
The World Wide Web
•Tabbed browsing allows you to open and view multiple Web pages in a single Web browser window
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The World Wide Web How does a Web browser display a home pagehome page?
Step 2.If necessary, connect to the Internet
Step 3.Connection to the Internet occurs, and a home page displays
Step 1.Click the Web browser program name
The World Wide Web
A home page is the first page that a Web site displaysWeb pages provide links to other related Web pages-
Surfing the Web
Downloading is the process of receiving information
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• Some Web pages are designed specifically for micro browsers
The World Wide WebA Web page has a unique address called a URL (uniform resource locator) or Web address. A web server delivers the Web page to your computer
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The World Wide Web
How do handheld computers and cellular telephones access the
Web?
Use a microbrowser that displays Web pages that contain mostly text
Must be Web-enabled
The World Wide WebWhat is a linklink?
Item found elsewhere on same Web page
Different Web page at same Web site
Web page at a different Web site
Built-in connection to another related Web page location
The World Wide WebHow can you recognize links?
A link can be text or an image
Pointer changes to a small hand when you point to link
Text links areusually underlinedand in a differentcolor
The World Wide Web
•What is a search enginesearch engine?
Program used to find Web sites and Web pages by entering words or phrases called search text
Also called a keyword
The World Wide WebWhat are the 99 basic types of Web sitestypes of Web sites?
Portal News Informational Business/Marketing Educational Entertainment Advocacy Blog Personal
The World Wide Web
A search engine is helpful in locating items such as:
Discovering Computers 2012: Chapter 2 24Page 85
The World Wide Web
Multimedia refers to any application that combines text with:
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The World Wide WebA thumbnail is a small version of a larger graphic —used to improve Web page display time
Usually click on thumbnail to display larger graphic
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The World Wide Web
What is animationanimation?
Appearance of motion created bydisplaying a series of still imagesin sequence
The World Wide WebWhat is audioaudio?
Music, speech, or any other sound Individual compressed sound files
that you download from the Web to your computer
Common Web audio file formats are AA, AAC, AIFF, ASF, MP3, WAV, WMA, RA, and QT
Once downloaded, you can play (listen to) the contents of the files
The World Wide WebWhat is streaming audiostreaming audio?
The process oftransferring audio
in a continuousand even flow
Enables you tolisten to musicas it downloads
to your computer
The World Wide Web•What is videovideo?
Consists of full-motion images that areplayed back at various speeds
MPEG (Moving Pictures Experts Group) is popular video compressionstandard
The World Wide Web•What is virtual reality (VR)virtual reality (VR)?
Use of computers to simulate real or imagined environment
Appears as a three dimensional (3-D) space Used for games and many
practical applications
The World Wide Web
•What are plug-insplug-ins ?
Programs that extend the capability of a browser
You can download many plug-ins at nocost from variousWeb sites
Web Publishing•What is Web publishingWeb publishing?
Step 1.Plan the Web site
Step 2.Analyze and design the Web site
Step 3.Create the Web site
Step 4.Deploy the Web site
Step 5.Maintain the Web site
Development and maintenance of Web pages
E-Commerce
•E-commerce is a business transaction that occurs over an electronic network
–M-commerce identifies e-commerce that takes place using mobile devices
Discovering Computers 2012: Chapter 2 34Page 98
E-Commerce
Discovering Computers 2012: Chapter 2 35Pages 98 - 99
Other Internet Services•What is E-mailE-mail?
Short for electronic mail The transmission of messages and files via a computer
network Messages can consist of simple text or can contain attachments,
such as documents, graphics, or audio/video clips Internet access providers usually provide an e-mail program Some Web sites—such as MSN Hotmail and Yahoo!—provide
free e-mail services One of the original services on the Internet
Other Internet Services•What is an e-mail addresse-mail address?
Unique name that consists of a user name and domain name that identifies the user
Other Internet Services•How does an e-mail message travel?
Step 1.Using e-mail software, you create and send message
Step 2.Your software contacts software on your ISP’s outgoing mail server
Step 4.When recipient uses e-mail software to check for e-mail messages, the message transfers from incoming mail server to recipient’s computer
Step 3.Software on outgoing mail server determines best route for data and sends message, which travels along Internet routers to recipient’s incoming mail server
Other Internet Services
FTP (File Transfer Protocol) is an Internet standard that permits file uploading and downloading with other computers on the InternetMany operating systems include FTP capabilitiesAn FTP server is a computer that allows users to upload and/or download files using FTP
Discovering Computers 2012: Chapter 2 39Page 107
Other Internet ServicesWhat is instant messaging (IM)instant messaging (IM)?
Step 2.The server determines if any of your established friends, family, or coworkers, called buddies, are online
Step 3.You send instant messages to an online buddy
Step 1.Login to the IM server
IM Server
Step 4.Your Instant Message travels through a messaging server and then to the online buddy
messaging Server
A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files
