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Exp2003 Int Ppt 01

The document provides an overview of the Internet and the World Wide Web. It describes how the Internet is a worldwide collection of connected networks and computers. It then explains how the World Wide Web, which is accessed via the Internet, allows for hyperlinking between web pages through HTML. It also provides details on how to access the Internet, use web browsers, conduct searches, and includes some basics on e-commerce and web page creation.

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Exploring Microsoft Office Committed to Shaping the Next Generation of IT Experts. Internet Explorer and the World Wide Web: Welcome to Cyberspace
Define the Internet and give a brief overview of its history Explain how the World Wide Web differs from the Internet Describe the structure of a Web address; explain what is meant by “backing up within an address” Describe the various buttons on the Internet Explorer toolbar Explain how to return to a Web site; distinguish between the History and Favorites lists Objectives (1 of 2)
Objectives (2 of 2) Name three different search engines; explain the advantage of using multiple engines with the same query Distinguish between AND, OR, and NOT Download a picture from the Web Discuss several similarities and differences between e-commerce and traditional commerce Distinguish between the http and https protocols; define a cookie Create a Web page
The Internet The Internet is a worldwide collection of networks connecting millions of computers all over the world. A server runs software that coordinates information among the other computers or clients The software on a server is called the network operating system.
The Internet The Internet is a worldwide collection of networks connecting millions of computers all over the world.
The Internet A Client – a computer that asks for data A server runs software that coordinates information among the other computers or clients. It receives a request and sends data to the Client. The software on a server is called the network operating system.
The Internet and the Worldwide Web
Accessing the Internet You can be connected via a direct or always-on connection, or a dial-up connection.
Accessing the Internet Dial-up Connection Modem – internal or external Sender - Converts digital signals from the computer to analog signals for phone lines Receiver – Converts analog signals to digital Modem or PC cards are inserted into the computers Data Transfer rate or Throughput is how fast the data travels between the two modems Connection Speed
Accessing the Internet Advantages of Dial-up Least costly in terms of hardware Least costly in terms of Internet Service Providers Hard to track for hackers Disadvantages of Dial-up Speed Can you use your phone line? Electrical Interference
Accessing the Internet Direct or always-on connection Digital Subscriber line – DSL Cable Integrated Services Digital Network – ISDN Satellite
Accessing the Internet DSL Uses standard phone lines or twisted pair wiring card One line is used for voice – slower speed Other two lines are used to send and receive data – from 128 Kbps to 1.5 megabits Some advantages…Disadvantages of DSL?
Accessing the Internet Advantages of DSL Faster? During peak times of Internet usage, lines are not shared Can use your phone Hard to track for hackers Disadvantages of DSL Costly in terms of hardware Costly in terms of installation Quality and speed affected by distance from the Central Switching Office 18,000 feet
Accessing the Internet Cable Uses fiber-optic lines on coaxial cable Transmits data at the speed of light On a network, our workstation has a NIC or Network Interface card to connect to the Network Cable also uses a cable modem Some advantages…Disadvantages of Cable?
Accessing the Internet Advantages of Cable Faster – speed of light Can use your phone Availability Less electrical interference Less expensive than DSL
Accessing the Internet Disadvantages of Cable Costly in terms of hardware – modem and NIC card Costly in terms of installation Cost of ISP
Accessing the Internet ISDN – Integrated Services Digital Network Uses standard twisted pair or phone lines ISDN modem – does not convert to analog – uses only digital signals Can use phone separately Some advantages…Disadvantages of ISDN?
Accessing the Internet Advantages of ISDN Twice as fast as dial-up Can use your phone Availability Disadvantages of ISDN Speed Costly in terms of installation More electrical interference
Accessing the Internet Satellite Uses coaxial cable Need a satellite dish – a modem sends data to the company over standard telephone lines signals Can use phone separately Some advantages…Disadvantages of Satellite?
Accessing the Internet Advantages of Satellite Can use your phone Availability Disadvantages of Satellite Speed Costly in terms of installation Affected by weather
Origins of the Internet U.S. Defense Department - Concerned about security due to connectivity developed an experimental Wan, called ARPANET. Circuit Switching – still used by most telephones companies, single line of communication Packet Switching – messages are sent or routed in packets by computers called routers.
Electronic Mail - Birth FTP - File Transfer Protocol . Allowed transmission of files from remote sites Telnet – allowed users to log on from different locations Bulletin Boards – Users could collect messages and files from one centralized site
Accessing the Internet Internet service providers (ISPs) are the gateway to the Internet. Growth is phenomenal Supply and demand has increased the number of ISP’s available
The Internet A network of networks Began in 1969 as ARPAnet (Advanced Research Project Agency Network) No central authority and thus impossible to state the precise size The Internet is not free just because you do not pay for it – Who pays for it?
World Wide Web The World Wide Web is the collection of Web pages accessed through the Internet. The Web is not the Internet! Computers that host Web pages are called Web servers . Servers are also used to connect Workstations/computers via a network with shared hardware and software.
Origin of Hypertext or Web Page HTML - Hypertext Markup Language Programming language A set of code or tags which determine what to do with pictures and text A Graphic User Interface? Invented by Berners-Lee and Calliau
Anchor Tags Real power of HTML Anchor tags allow us to link to other HTML documents Commonly called hyperlinks or Links
Links Hypertext Link Points to another document, picture file or e-mail address . [email_address] www.yahoo.com
Hypermedia Click on the picture!
Examples of Hypertext HEADINGS (<H#> ... </H#>) Header 1 Header 2 Header 3 Header 4 Header 5 Header 6 SEPARATORS Paragraph Break: <P> Line Break: <BR> Horizontal Rule: <HR>
Examples of Hypertext - 2 LISTS - UNNUMBERED <UL> <LI> apples <LI> bananas </UL> apples bananas NUMBERED or Ordered Lists <OL> <LI> oranges <LI> peaches <LI> grapes </OL> peaches grapes oranges
Hyperlinks The essence of the Web as you click on a link to move to the next document, it may be stored on a different computer Hyperlinks may contain text, graphics, sound, or video links Blue underlined fonts are unexplored Magenta links have been previously accessed www.microsoft.com www.microsoft.com
The World Wide Web A subset of the Internet consisting of all computers with hypertext or hypermedia documents These documents contain references (links) to other documents which may be on a different computer anywhere in the world Began in 1992 at the European Particle Physics Laboratory (CERN) in Switzerland
Web Sites A collection of linked Web pages Start usually with the Home Page All other HTML or Web pages are organized around the home page
Connecting to a Web Site Browsers usually use DOMAIN Name Addressing to locate a Web site Each site has a Unique Internet Protocol address or IP address What is the difference between these two addresses? http://www.cme.com and http:// 220.87.3204.02 One is a domain name and the other is the IP address for the same site.
Domain Name http://www.cme.com www.cme.com defines the domain name
Top Domain Name http://www.cme.com The last part of the domain name is the top level domain .com here
Top Level Domain - Examples .com .edu .net .org
TOP LEVEL Domain Names Original Six: .edu (education) .com (commercial) .gov (government) .mil (military) .net (network administration) .org (non-profit) New domains: .biz (business) .pro (licensed professional) .info (information services) .uk (United Kingdom) .ca (Canada) .au (Australia)
Transfer Protocols http://www.cme.com http: defines the transfer protocol Hypertext transfer protocol Other Transfer Protocols ftp: telnet https:
Pathname http://www.cme.com/prd/overview_FC653.html Prd/ is the pathname Overview_FC653.html is the filename
URL Uniform Resource Locator Transfer Protocol Domain name Pathname Filename
Examples of URLs My school: www.miami.edu Exploring Windows: www.prenhall.com/grauer My favorite site: bestpracticesindiscussionforums.blogspot.com Anti-virus updates: www.symantec.com Download software: www.tucows.com
Browsers A Web browser is a program used to view Web pages or view Hypertext Markup Language. Common browsers Microsoft Internet Explorer Netscape Navigator MSN Explorer America Online
Acronyms Abound HTTP – HyperText Transfer Protocol is used to transmit Web documents HTTPS – Secure protocol for confidential transactions HTML – The language in which all Web documents are displayed TCP/IP – A suite of protocols that allows multiple platforms to communicate ISP – Internet Service Provider
The Exploring Office Web Site Web address (or URL) Internet Explorer is the browser HTTP protocol
Menu Bar File Edit View Favorites Tools Help Address Bar URL Toolbar Back Button Forward Button Stop Refresh Home Search Favorites History Microsoft Internet Explorer
The Web is always changing Address bar (address is constant, but the content changes) Hyperlinks Print button
Search Engines A program that systematically searches the Web for documents on a specific topic Uses a key word or words as a query, A Query is a word or phrase, was returns information from a database. Several search engines are available Each search engine has its own database No search engine is best Uses Boolean (logical) operators Returns “hits” or documents once search has been submitted
Suggestions for Searching Use the Search button on the Internet Explorer Toolbar Try multiple search engines on one query Be aware of logical operators - AND, OR, and NOT Be specific on your Search: e.g., “Eleanor Roosevelt ” rather than “first ladies” Set as few Bookmarks/Favorites as you can!
Popular Web Search Engines http://www.search.com/ http://www.yahoo.com http://www.google.com/ http://www.webcrawler.com/ http://www.askjeeves.com/ http://www.lycos.com http://www.excite.com/ http://www.go.com/ http://www.msn.com/ http://www.altavista.com/
Search Rules and Techniques Specify Boolean operators And - Includes all findings of both key words Or - Looks for only one of the specified key words Not - Allows you to exclude certain key words Use multiple search engines Read online help about search criteria used for a particular search engine
Copyright Protection A copyright provides legal protection to a written or artistic work, give the author exclusive rights to its use and distribution Exceptions Public domain or Fair use exclusion Credit your sources Insert Footnote command Infringement of copyright Software piracy Downloading music illegally
Web Site and Saving an Image Choose Save Picture As command Right click picture for context-sensitive menu
E-commerce The exchange of goods and services Buyer and seller Products and suppliers A place to “meet” Marketing to attract the buyer Accept and process the order All of these elements are present in e-commerce and traditional commerce
Advantages of E-commerce For the Seller Open 24/7 Shoppers from anywhere Virtual inventory is cheaper and extensive Lower transaction costs Target your customers For the Buyer Open 24/7 Never leave home Easy to view and explore product line Comparison shop Web site knows you
Security and Privacy Secure transactions https protocol Encryption Privacy Cookie is a small file written to your disk each time you visit a site Problem is when one site can read many cookies, e.g., DoubleClick.com
Returning to a Previous Site History folder Favorites folder
Organize Favorites Move a favorite Create a new folder Delete a favorite Rename a favorite
A Simple Web Page Hyperlinks
The Source Code Anchor tags Paragraph tags
Microsoft Word Formatted text Hyperlinks Insert hyperlink button Graphic image
Simple Text Bullets button Type your text
Save As a Web Page File name File type
Create your own Webpage You can create your own Web Page by using Word!