The World Wide Web and the Internet How Vast Is Your Virtual Imagination? Chapter 2

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Objectives 1.Understand that the Web offers more than just “cool” sites to visit – many Web sites can help you find a job, research a term paper, get computing help, and make travel arrangements. 2.Effectively use both directory search engines and true search engines to find Web sites.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Objectives 3.Compare the pros and cons of different types of hardware for surfing the Web, including typical computer systems, Web computers, television- based Web surfing machines, Web phones, and pagers. 4.Define the role of connectivity software and Web browser software for connecting to and using the Web.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Objectives cont. 5.Identify the various types of Internet service providers (ISPs) and distinguish among the services they provide. 6.Define how the technical Internet infrastructure makes communications all over the world a reality.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved A:// The World Wide Web The Internet –Vast network of networked computers –Makes the Web possible The Web –Multimedia format with hyperlinks –GUI (graphical user interface) that rests on top of the Internet

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Addresses, Sites, And Pages Web site – specific location on the Web Web site address – Unique name that identifies a specific site Web page – specific portion of a Web site Favorites – "bookmarkers" for the Web

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Web Site Hierarchy

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Web Sites Worth Surfing Careers Information and Reference Computing Travel

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Careers

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Information & Reference

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Computing

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Travel

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Using Search Engines Search Engine –Facility on the Web –Finds web sites by key word or words Two main types –Directory search engine Yahoo –True search engine Ask Jeeves

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Ask Jeeves

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Search Engines Mamma.com – AltaVista – HotBot – Lycos – Webcrawler –

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved ISeries Insights Ethics, Security & Privacy Scams and shady deals can exist in the "click-and- mortar" world Criminals can hide behind Web addresses Be careful when ordering

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section A:// 1.The ___________ is a vast network of networked computers (hardware and software) that connects millions of people all over the world. 2.A _____________ is a specific portion of a Web site that deals with a certain topic.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section A:// If you find a site you’d like to visit frequently, you should add it to your ______________ list. A _________________ is a facility on the Web that allows you to find Web sites by key word or words. A _______________ organizes listings of Web sites into hierarchical lists.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved B:// Hardware and Software for Surfing the Web Can use a variety of hardware configurations –Expensive notebook –Inexpensive cell phone Software –Connectivity software –Web browser

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Hardware for Surfing the Web Modem Web computer Web access through TV Web phones Pagers PDAs (personal digital assistants)

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Television-Based Web Surfing

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Connectivity Software for Surfing the Web

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section B:// 1. A __________ is a device that connects your computer through a phone line to a network of other computers. 2. A ______________ is a scaled-down version of today’s typical computer system that provides Web access at about half the price.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section B:// 3.A popular television-based Web surfing system is ________. 4. A ____________ is a Web browser software for Web phones that can display text information in a small amount of space. 5. A _____________ is a popular Web- accessing pager.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved C:// Internet Service Providers A company that provides service to the Internet Service for… –Individuals –Organizations –Businesses –Schools and universities

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Commercial ISPs Charge a fee May place a limit on Internet time Provides Web space for your Web site Can offer 24-hour technical support Offers free , chat rooms, and instant messenger MSN, AOL, CompuServe, AT&T WorldNet

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Commercial ISP AT&T WorldNet

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Free ISPs Absolutely free May display advertising banners Limited Web space Limited technical support Popular free ISPs –NetZero –Juno

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Free ISP Juno

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Guidelines for Choosing an ISP Do you need Web space? Is great technical support important? Is money a serious consideration? Is privacy important to you?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section C:// 1. An _____________ is a company that provides individuals, organizations, and businesses access to the Internet. 2. ___________ ISPs charge you a monthly fee to access the Internet. 3.____________ is a storage area where you keep your Web site.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section C:// 4. Juno is a _________ ISP. 5. If you want free access, you should choose a free ISP, your school, or your _________.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved D:// The Internet Behind the Web Internet makes the Web possible Internet Technology –Network –Internet backbone –Network access point (NAP) –Network service provider (NSP)

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved The Internet Backbone

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Internet Addresses and Domain Names Domain name –Identifies a specific computer on the Internet – URL (uniform resource locator) –Address for a specific page or document –Technical name Often called "web page" or "address"

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved The Anatomy of a URL

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Top-Level Domain DomainsDescription ComCommercial or for-profit business EduEducational institution GovU.S. government agency MilU.S. military organization NetInternet administrative organization OrgProfessional or non-profit organization IntInternational treaties organization

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Practically Speaking How Old is the Internet? Began with military research in 1957 Connected computers formed ARPANet in 1969 World Wide Web browsers created in 1991

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Computers on the Internet Server computer (host computer) –Computer that provides services and information to other computers –High-end work station, minicomputer, or mainframe Client computer –Computer used to surf the Internet –Desktop, notebook, cell-phone, or TV- based computer

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Types of Servers on the Internet Webserver Mail server FTP server IRC (Internet relay chat) server

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved FTP Server ZDNet

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Information on the Internet Communications protocol –A set of rules that every computer follows to transfer information –How information moves from computer to computer –Different types of computers handle information in different forms To communicate, computers must have common protocols

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Protocols TCP/IP (Transfer Control Protocol/Internet Protocol) –Basic protocol that makes the Internet work Hypertext transfer protocol (http) –Supports movement of info over the Web –To access a Web site, you use TCP/IP and http File transfer protocol (FTP) –Transfer files from one computer to another –Can download a variety of file types

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section D:// 1. A ________ computer (also called a host computer) is a computer on the Internet that provides information and services to other computers and Internet users such as you. 2. A _______________ is a point on the Internet where several connections converge. 3.A ____________ is the technical term of an address on the Internet.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section D:// 4. A _________________ is a set of rules that every computer follows to transfer information. 5. __________________ is the communications protocol that supports the movement of information over the Web, essentially from a Web server to you.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved E:// Consumer Issues Web Portals Questions to consider… –How fast can I surf the Internet? –Spending too much time on the Internet? –Is the Web a fad that will go away?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Microsoft Outlook

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved MSN.com Web Portal

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section E:// 1. __________ is software you use to electronically communicate with other people. 2. An _______________ is a unique address for a person using an system. 3. A _____________ is a site that provides a wide range of services, including search engines, free , chat rooms, discussion boards, and links to hundreds of different sites.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Making the Grade Section E:// 4. _______________ is the amount of information that can travel from one place to another in a given amount of time.

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved F:// "Key" Key Terms client computer (p. 2.21) connectivity software (p. 2.13) (p. 2.23) address (p. 2.23) Internet (p. 2.2) ISP (p. 2.15) network (p. 2.18) search engine (p. 2.7) Server computer (p. 2.21) Web page (p. 2.3) World Wide Web (Web) (p. 2.2)

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Frequently Asked Questions What is the difference between the Internet and the Web? I thought they were one and the same. Those URLs are really long. Is there an easier way to remember the address of a Web site? Is a modem required to connect to the Internet?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved FAQs cont. I don't own a business so why would I want to have a Web page? When I access the Internet in my school's lab, am I using a modem? I received a free copy of an Internet browser in the mail. Does this mean that I can access the Internet for free?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Hands-On Projects E-Commerce What measures can be taken by auction houses like eBay to make sure that buyers and sellers don't get "taken"? What can brick-and-mortar bookstores do to keep people from shopping for books on the Web? Playing games on the Web is popular. How are businesses making money from these games?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Hands-On Projects On the Web Research on the Web is becoming very convenient and popular. What will the future be for traditional college libraries? What would you do to improve your school's Web site? How are some Web companies able to offer free ?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Hands-On Projects Ethics, Security, & Privacy Some government agencies are starting to post home property purchases on the Web. Should this information be available for everyone to see? It is very easy to find social security numbers on the Web of deceased individuals. Can you see any problems with this?

McGraw-Hill/Irwin Copyright 2002 by the McGraw-Hill Companies, Inc. All rights reserved Hands-On Projects Group Activities Some school labs have more than one browser installed. What are the advantages/disadvantages of the each browser? What's the best cell phone to have to access the Web? What are its features? How much does it cost? What regional ISPs are in your area? What do they offer?