Computers 2005 PrenticeHall Inc Slide 1 Computers Chapter

Computers © 2005 Prentice-Hall, Inc. Slide 1

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

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

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

Computers Going Online The Internet üNo one group controls the Internet üThe Internet Society üInternet Corporation for Assigned Names and Numbers (ICANN) üWorld Wide Web Consortium (W 3 C) © 2005 Prentice-Hall, Inc. Slide 5

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

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

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

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

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

Computers Going Online Connecting to the Internet ü Transmission Control Protocol/Internet Protocol (TCP/IP) ü Protocol: set of rules for how computers communicate ü 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 ü Point-of-presence (POP) ü IP address ü Dynamic IP address © 2005 Prentice-Hall, Inc. Slide 12

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

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

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

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

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

Computers Going Online Internet Browsers ü Web site ü pages ü home page – first page you see at a site ü 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 ü Microsoft Internet Explorer ü Netscape © 2005 Prentice-Hall, Inc. Slide 20

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

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

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

Computers Going Online Browser Plug-ins ü Windows Media Player ü Quick. Time ü i. Pix Movies ü Acrobat Reader © 2005 Prentice-Hall, Inc. Slide 24

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Computers Going Online Internet Issues ü Shady side of the Internet ü hackers and crackers ü hate mongers ü pornography ü filtering programs ü 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