Computers © 2005 Prentice-Hall, Inc. Slide 1

Computers Chapter 3 Going Online © 2005 Prentice-Hall, Inc. Slide 2

Computers Chapter 3 – Going Online Objectives Understand the scope of the online world, including how to go online and understanding Internet addresses Utilize Internet browsers Access various Internet applications Be aware of critical Internet issues © 2005 Prentice-Hall, Inc. Slide 3

Computers Going Online The Internet Internet: worldwide collection of networks ARPANET: network for scientists that evolved into the Internet Internet backbone: major communications lines of the Internet © 2005 Prentice-Hall, Inc. Slide 4

Computers Going Online The Internet No one group controls the Internet The Internet Society Internet Corporation for Assigned Names and Numbers (ICANN) World Wide Web Consortium (W3C) © 2005 Prentice-Hall, Inc. Slide 5

Computers Going Online Connecting to the Internet Bandwidth – amount of information that can be sent over the channel 56,000 bits per second (bps) 9M (millions of bits, or megabits per second) © 2005 Prentice-Hall, Inc. Slide 6

Computers Going Online Connecting to the Internet Broadband – high bandwidth Narrowband – low bandwidth © 2005 Prentice-Hall, Inc. Slide 7

Computers Going Online Connecting to the Internet Narrowband dialup service © 2005 Prentice-Hall, Inc. Slide 8

Computers Going Online Connecting to the Internet Broadband cable Digital Subscriber Line (DSL) satellite wireless access points wireless LAN PC card Wi-Fi © 2005 Prentice-Hall, Inc. Slide 9

Computers Going Online Connecting to the Internet Internet service provider (ISP) Information service gateway communications software user ID and password Direct LAN connection T-1 line T-3 line © 2005 Prentice-Hall, Inc. Slide 10

Computers Going Online Connecting to the Internet Transmission Control Protocol/Internet Protocol (TCP/IP) Protocol: set of rules for how computers communicate Packet: the part of a message that contains the data and the address the message is being sent to © 2005 Prentice-Hall, Inc. Slide 11

Computers Going Online Connecting to the Internet Point-of-presence (POP) IP address Dynamic IP address © 2005 Prentice-Hall, Inc. Slide 12

Computers Going Online Connecting to the Internet No PC needed televisions video game consoles cellular phones Internet appliances © 2005 Prentice-Hall, Inc. Slide 13

Computers Going Online Retrieving and Viewing Information on the Internet Client program – Internet browser: runs on user’s computer Server program – runs on server computer © 2005 Prentice-Hall, Inc. Slide 14

Computers Going Online Retrieving and Viewing Information on the Internet Domain name: name or abbreviation of the name of the organization Uniform resource locator (URL): address of a web page © 2005 Prentice-Hall, Inc. Slide 15

Computers Going Online Retrieving and Viewing Information on the Internet URL access protocol domain name top-level domains: denote affiliation .com .edu folder filename © 2005 Prentice-Hall, Inc. Slide 16

Computers Going Online Internet Browsers Browsers retrieve and view Internet-based information interact with servers download and upload information © 2005 Prentice-Hall, Inc. Slide 17

Computers Going Online Internet Browsers Applets or ActiveX controls give designers added flexibility animation multimedia displays © 2005 Prentice-Hall, Inc. Slide 18

Computers Going Online Internet Browsers Web site pages home page – first page you see at a site hyperlinks – allow user to click on an icon and be taken to other resources on the Internet © 2005 Prentice-Hall, Inc. Slide 19

Computers Going Online Navigating the Internet Microsoft Internet Explorer Netscape © 2005 Prentice-Hall, Inc. Slide 20

Computers Going Online Navigating the Internet Back: go to previous page Forward: go to next page Stop: ends transmission Refresh: reload Web page Favorites: have browser remember favorite sites Location bar: where user enters URL © 2005 Prentice-Hall, Inc. Slide 21

Computers Going Online Browser Plug-ins Plug-in – gives the browser added capabilities © 2005 Prentice-Hall, Inc. Slide 22

Computers Going Online Browser Plug-ins Shockwave Player Flash Player RealJukebox Liquid Player © 2005 Prentice-Hall, Inc. Slide 23

Computers Going Online Browser Plug-ins Windows Media Player QuickTime iPix Movies Acrobat Reader © 2005 Prentice-Hall, Inc. Slide 24

Computers Going Online Browser Plug-ins Streaming audio and video media is presented continuously instead of being downloaded © 2005 Prentice-Hall, Inc. Slide 25

Computers Going Online Internet Resources and Applications Finding information on the Web browsing: just looking around searching: trying to find specific information © 2005 Prentice-Hall, Inc. Slide 26

Computers Going Online Browsing the Net Portal –site that provides a number of services © 2005 Prentice-Hall, Inc. Slide 27

Computers Going Online Searching the Net Search engine – resource that finds sites based on user input © 2005 Prentice-Hall, Inc. Slide 28

Computers Going Online Tips for Searching the Net Read the rules for each search engine Try multiple search engines Follow hyperlinks Choose search terms carefully Be persistent © 2005 Prentice-Hall, Inc. Slide 29

Computers Going Online Searching the Net Hits page is retrieved for viewing page is listed in search engine results © 2005 Prentice-Hall, Inc. Slide 30

Computers Going Online Searching the Net Frequently Asked Questions (FAQs) lists answers to questions asked often at a particular site © 2005 Prentice-Hall, Inc. Slide 31

Computers Going Online Internet Applications Servers user-friendly multimedia documents hyperlinks interactive frames © 2005 Prentice-Hall, Inc. Slide 32

Computers Going Online Internet Applications File Transfer Protocol (FTP) servers easily download/upload files Anonymous FTP sites © 2005 Prentice-Hall, Inc. Slide 33

Computers Going Online Communicating over the Internet E-mail e-mail server file attachments Newsgroups Mailing lists or listservs push technology © 2005 Prentice-Hall, Inc. Slide 34

Computers Going Online Cybertalk Emoticons or smileys ;-) : -) : -(  © 2005 Prentice-Hall, Inc. Slide 35

Computers Going Online Netiquette Using all capital letters is considered SHOUTING Never send unsolicited e-mail (spam) Consider your audience when forwarding Internet content © 2005 Prentice-Hall, Inc. Slide 36

Computers Going Online Netiquette Never reveal others’ personal information Be patient with people who are just getting online (newbies) Don’t comment on others’ spelling, grammar, or punctuation © 2005 Prentice-Hall, Inc. Slide 37

Computers Going Online Netiquette Keep private communications private Consider e-mail attachment size before sending to someone using dialup Confirm virus warnings before forwarding Use an anti-virus program © 2005 Prentice-Hall, Inc. Slide 38

Computers Going Online Internet Applications Webcasting Jukebox © 2005 Prentice-Hall, Inc. Slide 39

Computers Going Online Internet Issues Shady side of the Internet hackers and crackers hate mongers pornography filtering programs gambling © 2005 Prentice-Hall, Inc. Slide 40

Computers Chapter 3 – Going Online Lesson Summary Understand the scope of the online world, including how to go online and understanding Internet addresses Utilize Internet Browsers Access various Internet applications Be aware of critical Internet issues © 2005 Prentice-Hall, Inc. Slide 41