Chapter 9 The Internet - FTMS

CSCA0101 Computing BasicsCSCA0101COMPUTING BASICSChapter 9The Internet1

CSCA0101 Computing BasicsThe Internet1.2.3.4.5.The InternetTypes of NetworkWhat Makes Internet Works?Internet EquipmentInternet Applications2

CSCA0101 Computing BasicsThe InternetThe Internet A global network connectingmillions of computersMore than 100 countries arelinked into exchanges ofdata, news and opinions.The Internet links arecomputer networks all overthe world so that users canshareresourcesandcommunicatewitheachother.3

CSCA0101 Computing BasicsThe InternetTypes of Computer NetworkLocal Area Network (LAN) A LAN connects network devices over a relativelyshort distance.A networked office building, school, or home usuallycontains a single LAN, though sometimes onebuilding will contain a few small LANs (perhaps oneper room), and occasionally a LAN will span a groupof nearby buildings.4

CSCA0101 Computing BasicsThe InternetTypes of Computer NetworkMetropolitan Area Network (MAN) A metropolitan area network(MAN) is a largecomputer network that usually spans a city or a largecampus. A MAN often acts as a high speed network to allowsharing of regional resources. A MAN typically covers an area of between 5km and50km diameter. A MAN might be owned and operated by a singleorganization, but it usually will be used by manyindividuals and organizations.5

CSCA0101 Computing BasicsThe InternetTypes of Computer NetworkWide Area Network(WAN) WAN covers a large geographic area such ascountry, continent or even whole of the world. A WAN is a geographically-dispersed collection ofLANs. Most WANs (like the Internet) are not owned by anyone organization but rather exist under collective ordistributed ownership and management.6

CSCA0101 Computing BasicsThe InternetInternet Access To gain access to the internet, the user has toregister to any Internet Service Provider (ISP). Types of Internet connection:– Dail-up– Integrated services digital network– Asymmetric Digital Subscriber Line– Wireless Internet Connections– Internet over Satellite7

CSCA0101 Computing BasicsThe InternetInternet AccessDial-up Slower that other type of connectionConnects through existing phone lines using dial-upmodemCheapestMust “dial-up” to connect to Internet and disconnectwhen done.Cannot use Internet and phone line at the sametime.8

CSCA0101 Computing BasicsThe InternetInternet AccessDial-up9

CSCA0101 Computing BasicsThe InternetInternet AccessDigital Subscriber Line (DSL) Broadband – faster than dial-up connectionConnects through phone lines, but does not requirephone serviceAlways onInternet and phone can be used in the same timeUnavailable in many location10

CSCA0101 Computing BasicsThe InternetInternet AccessDigital Subscriber Line (DSL)11

CSCA0101 Computing BasicsThe InternetInternet AccessCable Broadband – faster than dial-up and DSLUse cable connectionAlways onOnly available where cable is available12

CSCA0101 Computing BasicsThe InternetInternet AccessCable13

CSCA0101 Computing BasicsThe InternetInternet AccessSatellite Broadband – faster than dial-up, but data is delayedConnects via satellitesCan be affected by rain and snowDoes not require phone lines and cablesCan be use anywhere around the world14

CSCA0101 Computing BasicsThe InternetInternet AccessSatellite15

CSCA0101 Computing BasicsThe InternetInternet Access3G and 4G Available for mobile phones, computers and tabletsConnects wirelessly through 3G/4G providerCan access Internet anywhereSlower than DSL and Cable connection16

CSCA0101 Computing BasicsThe InternetInternet Access3G and 4G17

CSCA0101 Computing BasicsThe InternetChoosing Internet Service ProviderBelow are some things to consider as you researchISPs: SpeedPriceEase of InstallationService RecordTechnical SupportContract Terms18

CSCA0101 Computing BasicsThe InternetHow Internet Works? Because the Internet is a global network ofcomputers each computer connected to the Internetmust have a unique address.This address is known as an IP address.19

CSCA0101 Computing BasicsThe InternetInternet Requirement Computer with modem/router/network card.Internet account with ISP.Application software:– Web browser (Firefox, Chrome)– Email client (MS Outlook)– Plugins software (Adobe Reader, Flash Player)Optional: Speaker, Printer, Webcam20

CSCA0101 Computing BasicsThe InternetInternet Usages CommunicationSend and receive emailsDownload filesPost your opinion to a newsgroupChattingSurf the world wide webBusinessShoppingEntertainment21

CSCA0101 Computing BasicsThe InternetInternet Applications An Internet application is an interactive, compiledapplication that can be accessed through acorporate or through the Internet.Internet applications can perform complex businessprocesses on either the client or the server.The application uses the Internet protocol to receiverequests from a client, typically a Web browser,process associated code, and return data to thebrowser.22

CSCA0101 Computing BasicsThe InternetInternet Applications The World-Wide Web (WWW)Electronic Mail (E-Mail)File Transfer Protocol (FTP)Search EngineChattingVideo ConferencingE-Commerce23

CSCA0101 Computing BasicsThe InternetWorld Wide Web (WWW) The World Wide Web is asystem of interlinked hypertextdocuments accessed via theInternetWith a web browser, one canview web pages that maycontain text, images, videos,and other multimedia andnavigate between them viahyperlinks24

CSCA0101 Computing BasicsThe InternetWorld Wide Web (WWW) It use a protocol called HTTP – Hypertext TransferProtocolHTTP defines how messages are formatted andtransmitted, and what actions Web servers andbrowsers should take in response to variouscommands.25

CSCA0101 Computing BasicsThe InternetWorld Wide Web (WWW) A Uniform Resource Locator, or URL is theaddress of a document you'll find on the WWW.The elements in a URL:Protocol://server's x.html26

CSCA0101 Computing BasicsThe InternetWorld Wide Web (WWW)Types of website: Static– A static website is one that has web pages storedon the server in the format that is sent to a clientweb browser. It is primarily coded in HypertextMarkup Language (HTML) Dynamic– A dynamic website is one that changes orcustomizes itself frequently and automatically,based on certain criteria.27

CSCA0101 Computing BasicsThe InternetElectronic Mail (Email) The transmission of messages over communicationsnetworks.It is a fast and efficient way to communicate withfriends or colleagues.You can communicate with one person at a time orthousands; you can receive and send files and otherinformation.28

CSCA0101 Computing BasicsThe InternetElectronic Mail (Email) Basic email functions:– send and receive mail messages– save your messages in a file– print mail messages– reply to mail messages– attach a file to a mail message29

CSCA0101 Computing BasicsThe InternetElectronic Mail (Email) Email addresssomeone@mail server The email address has three parts:– a user name– an "at" sign (@)– the address of the user's mail server ExampleHarris@ftms.edu.my30

CSCA0101 Computing BasicsThe InternetEmail Client An email client is a computer program used tomanage a user's email.Popular email clients include Microsoft Outlook,Pegasus Mail, Mozilla's Thunderbird, and AppleInc.'s Mail.31

CSCA0101 Computing BasicsThe InternetWeb-based mail Is an e-mail service intended to be primarilyaccessed via a web browser. Very popular webmail providers:– Gmail– Yahoo! Mail– Hotmail Web mail is popular as it allows you to send orreceive e-mail from anywhere.32

CSCA0101 Computing BasicsThe InternetFile Transfer Protocol (FTP) The protocol for exchanging files over the Internet.Used for moving files between two hosts on aTCP/IP network.FTP is most commonly used to download a file froma server using the Internet or to upload a file to aserver.33

CSCA0101 Computing BasicsThe InternetFile Transfer Protocol (FTP) To do FTP, a user invokes one of two commands:– get - the command for transferring a file fromanother server to your own computer.– put - the command for moving a file from yourcomputer to another one.34

CSCA0101 Computing BasicsThe InternetSearch Engine A search engine is designed tosearch for information on theinternet.Search engine presents thesearch results in the form of asearch results list.The search results can be webpages, images, videos, and othertype of files.Example:– Google– Bing35

CSCA0101 Computing BasicsThe InternetChatting Chatting is the othermethodforInternetconversation.It enables people connectedanywhere on the Internet tojoin in live discussions.Chat sessions allow manyusers to join in the samefree-formconversation,usually centered around adiscussion topic.36

CSCA0101 Computing BasicsThe InternetChattingExamples: MSN MessengerYahoo MessengerIRCPidgin37

CSCA0101 Computing BasicsThe InternetVideo Conferencing A videoconference orvideo conference is a setofinteractivetelecommunicationtechnologies which allowtwo or more locations tointeract via two-way videoand audio transmissionssimultaneously.38

CSCA0101 Computing BasicsThe InternetVideo ConferencingThe other components required for a videoconferencingsystem include: Video input and outputAudio input and outputData transferComputer39

CSCA0101 Computing BasicsThe InternetE-Commerce Electronic commerce or ECommerce consists of the buyingand selling of products orservices over electronic systemssuch as the Internet and othercomputer networks. It includes the entire onlineprocess of developing,marketing, selling, delivering,servicing and paying for productsand services.40

CSCA0101 Computing BasicsThe InternetE-CommerceSome common applications related to electroniccommerce are the following: Domestic and international payment systems Group buying Automated online assistants Online shopping and order tracking Online banking Shopping cart software Electronic tickets41

CSCA0101 Computing Basics 22 The Internet Internet Applications An Internet application is an interactive, compiled application that can be accessed through a corporate or through the Internet. Internet applications can perform complex business processes on either the client or the server. The application uses the Internet protocol .