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Lesson 2
THE INTERNET and WORLD WIDE WEB (www)
Lesson 2 OBJECTIVES
Explain how to access andconnect to the Internet
Explain how to access andconnect to the Internet
Explain how to view pages and searchfor information on the Web
Explain how to view pages and searchfor information on the Web
Describe the types of Web sitesDescribe the types of Web sites
Identify the steps requiredfor Web publishing
Identify the steps requiredfor Web publishing
Explain how e-mail, FTP, newsgroupsand message boards, mailing lists, chat rooms,
Instant messaging, and Internet telephony work
Explain how e-mail, FTP, newsgroupsand message boards, mailing lists, chat rooms,
Instant messaging, and Internet telephony work
Identify the rules of netiquetteIdentify the rules of netiquette
Next
Describe the types of e-commerce
The Internet
What are some services found on the Internet?
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The Internet
Services found on the Internet:
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Chat
Real-time communication between two users via computer.
Once a chat has been initiated, either user can enter text by typing on the keyboard and the entered text will appear on the other user's monitor. Most networks and online services offer a chat feature.
The Internet
Services found on the Internet:
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Electronic Commerce
Often referred to as simply e-commerce, business that is conducted over the Internet using any of the applications that rely on the Internet, such as e-mail, instant messaging, shopping carts, Web services, UDDI, FTP, and EDI, among others. Electronic commerce can be between two businesses transmitting funds, goods, services and/or data or between a business and a customer.
The Internet
Services found on the Internet:
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Short for electronic mail, the transmission of messages over communications networks. The messages can be notes entered from the keyboard or electronic files stored on disk. Most mainframes, minicomputers, and computer networks have an e-mail system. Some electronic-mail systems are confined to a single computer system or network, but others have gateways to other computer systems, enabling users to send electronic mail anywhere in the world. Companies that are fully computerized make extensive use of e-mail because it is fast, flexible, and reliable.
The Internet
Services found on the Internet:
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Instant messaging
The Internet
How did the Internet originate?
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Goal:To function if
part of network were disabled
Became functional
September 1969
ARPANET
Networking project by Pentagon’s Advanced
Research Projects Agency (ARPA)Goal:
To allow scientists at different
locations to share information
The Internet
How has the Internet grown?
TodayMore than 350 million computer linked hosts
1984More than 1,000 hosts
1969Four hosts
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The Internet
Who controls the Internet?
World Wide Web Consortium (W3C)
Oversees research, sets standards and guidelines
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High-speed connection
High-speed connection
Slow-speed technology
Slow-speed technology
How the Internet Works
How can you connect to the Internet?
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Dial-up accessmodem in your computer uses a
standard telephone line to connect to the Internet
Dial-up accessmodem in your computer uses a
standard telephone line to connect to the Internet
Digital subscriber line (DSL), cable telephone Internet
services (CATV), cable modem,fixed wireless, and satellite modems
Digital subscriber line (DSL), cable telephone Internet
services (CATV), cable modem,fixed wireless, and satellite modems
Connection is always on—whenever the computer
is running
Connection is always on—whenever the computer
is running
Connection must be established each time you log on. Slow but inexpensive
Connection must be established each time you log on. Slow but inexpensive
How the Internet Works
What are ways to access the Internet?
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Common methods of home access include
• dial-up,
•landline broadband (over coaxial cable, fibre optic or copper wires),
•Wi-Fi,
•satellite and
•cell phones.
How the Internet Works
How might data travel the Internet using a cable modem connection?
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How the Internet Works
What is a domain name?
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The World Wide Web
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What is the World Wide Web (WWW)?
A worldwide collection of electronic documents
Each electronic document is called a Web page
Also called the Web
Can contain text, graphics, sound, video, and built-in connections
A Web site is a collection of related Web pages
The World Wide Web
What is a Web browser?
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Web browser is a program that allows you to view Web pages. Among them are the following:
MicrosoftInternetExplorer
Netscape
Firefox Opera
Mozilla
Safari
The World Wide Web
What is a home page?
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What is downloading?
A home page is also called a web page or a web site. The first Web site went on-line in 1991.
On April 30, 1993, CERN announced that the World Wide Web would be free to anyone.
Downloading is the process of transferring data from a source computer to another computer, a peripheral device, or a remote location.
The World Wide Web
What is a URL?
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Uniform Resource Locators or URLs are the addresses used to locate the files. The information contained in a URL gives you the ability to jump from one web page to another with just a click of your mouse.
When you type a URL into your browser or click on a hypertext link, your browser sends a request to a remote computer, called a web server, to download one or more files.
The World Wide Web
What is a hyperlink (link)?
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Hypertext: a format of information which allows, in a computer environment, one to move from one part of a document to another or from one document to another through internal connections among these documents (called "hyperlinks");
The World Wide Web
How can you recognize links?
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The World Wide Web
What is a search engine?
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The World Wide Web
What is a subject directory?
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The World Wide Web
What is a hit?
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Any Web site name that is listed as the result of a search
Step 4. Click link to view Web site
Step 1. Go to search engine
Step 2.Select type of search you wantto run
Step 3. View hits
The World Wide Web
What is multimedia?
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Multimedia is media that uses multiple forms of information content and information processing (e.g. text, audio, graphics, animation, video, interactivity) to inform or entertain the (user) audience.
Multimedia also refers to the use of (but not limited to) electronic media to store and experience multimedia content. In fine art it is a synonym for traditional mixed media as well as technological new media (ArtLex, NWD). Rich media is also a synonym for multimedia.
The World Wide Web
What is animation?
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Animation is the filming a sequence of drawings or positions of models to create an illusion of movement. It is an optical illusion of motion due to the phenomenon of persistence of vision.
The World Wide Web
What is audio?
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Computer audio devices refers to speakers, or multimedia speakers, are external speakers and are usually equipped with a male-end stereo jack plug (usually color-coded green) for computer sound cards; however, there are some that have female RCA connector, and some people link computer sound cards to nearby stereo systems. There are also USB speakers which gain their power from the 5 volts of a USB port. Computer speakers are usually a simplified stereo system without a radio or other media sources built in.
The World Wide Web
What is streaming audio?
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In its most basic notion, the only difference between streaming media and media that you have in its entirety before accessing, is that with streaming, you can begin to access the media before you have received it all. In other words, while you are watching, the rest is arriving.
The World Wide Web
What is video?
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Video refers to computer display or computer monitor is an output device that is part of a computer's display system.
A cable connects the monitor to a video adapter (video card) that is installed in an expansion slot on the computer’s motherboard. This system converts signals into text and pictures and displays them on a TV-like screen (the monitor).
The World Wide Web
What is virtual reality (VR)?
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Virtual reality is a three-dimensional computer simulation in which the user actively participates.
The World Wide Web
What are plug-ins?
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Plug-ins are hardware or software module that adds a specific feature or service to a larger system.
The idea is that the new component simply plugs in to the existing system. For example, there are number of plug-ins for the Netscape Navigator browser that enable it to display different types of audio or video messages. Navigator plug-ins are based on MIME file types.
Web Publishing
What is Web publishing?
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Development and maintenance of Web pages
Step 4.Deploy the Web site
Step 1.Plan the Web site
Step 3.Create the Web site
Step 2.Analyze and design the Web site
Step 5.Maintain the Web site
E-Commerce
What is E-Commerce?
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Electronic commerce, often referred to as simply e-commerce, business that is conducted over the Internet using any of the applications that rely on the Internet, such as e-mail, instant messaging, shopping carts, Web services, UDDI, FTP, and EDI, among others. Electronic commerce can be between two businesses transmitting funds, goods, services and/or data or between a business and a customer.
Other Internet Services
What is an e-mail address?
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Other Internet Services
What is FTP?
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FTP is an acronym for File Transfer Protocol.
An FTP Server is an internet server that is an archive of documents and files that can be transferred to your computer.
FTP (File Transfer Protocol)
The simplest and most secure way to exchange files over the Internet.
FTP Client is the software that is designed to transfer files back-and-
forth between two computers over the Internet. It needs to be installed
on the computer and can only be used with a live connection to the
Internet. (Browsers, WS-Ftp, SSH, Cute-Ftp,...)
PC ARF
Other Internet Services
What are newsgroups and message boards?
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Other Internet Services
What is a chat?
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A chat is a real-time communication between two users via computer.
Once a chat has been initiated, either user can enter text by typing on the keyboard and the entered text will appear on the other user's monitor. Most networks and online services offer a chat feature.
Other Internet Services
What is instant messaging (IM)?
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A real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files
Step 1.Login to the IM server
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 4.Your Instant Message travels through a messaging server and then to the online buddy
Step 5.Your buddy replies
Other Internet Services
What is internet telephony?
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Netiquette
What is netiquette?
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Golden Rule: Treat others as you would like them to treat you.
Netiquette is a compound word for Internet Ettiquete.
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
E-MailE-Mail
FTPFTP
Newsgroups and Message BoardsNewsgroups and Message Boards
Chat Rooms and Instant MessagingChat Rooms and Instant Messaging
Internet TelephonyInternet Telephony
Lesson 2 Complete
NetiquetteNetiquette
