TOPIC 3 Internet Technology & WWW PDF

TOPIC 3.0 INTERNET TECHNOLOGY & WWW COMPUTER SKILL AND TECHNOLOGY TCL0052 TOPIC 3.0 INTERNET TECHNOLOGY & WWW Chapter Overview 3.1 INTERNET TECHNOLOGY 3.1.1 Overview of the Internet 3.1.2 Evolution of the Interne...

TOPIC 3.0 INTERNET TECHNOLOGY & WWW COMPUTER SKILL AND TECHNOLOGY TCL0052 TOPIC 3.0 INTERNET TECHNOLOGY & WWW Chapter Overview 3.1 INTERNET TECHNOLOGY 3.1.1 Overview of the Internet 3.1.2 Evolution of the Internet 3.1.3 Internet Connection 3.1.4 Internet Service Provider 3.1.5 Internet Services 3.2 WORLD WIDE WEB 3.2.1 WEB Browser 3.2.2 WEB Address 3.3 NETWORK BASICS 3.3.1 Classification of Network 3.1.1 OVERVIEW OF THE INTERNET  3.1.1 Overview Of The Internet The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals  3.1.1 Overview Of The Internet A network of computer networks which operates worldwide using a common set of communications protocols. 3.1.2 EVOLUTION OF THE INTERNET  3.1.2 Evolution of the Internet ARPANET ARPA –Advance Research Project Agency created by US Department of Defense The network is called ARPANET The network became functional in September 1969  3.1.2 Evolution of the Internet ARPANET The Internet originated as ARPANET and had two main goals: 3.1.3 THE INTERNET CONNECTION  3.1.3 The Internet Connection Types of Connection and Internet Access 1.Dial-up Connection 2.Broadband Internet Connection  3.1.3 The Internet Connection Types of Connection and Internet Access 1.Dial-up Connection  3.1.3 The Internet Connection Types of Connection and Internet Access 1. Dial-up Connections: a) Dial-up o PC has to dial via a phone line to connect o Conventional dial-up ▪ Slower, but cheaper ▪ Ties up phone lines ▪ Relatively secure from hackers ▪ Example :- TMnet  3.1.3 The Internet Connection Dial-up Connection Advantages Disadvantages Security Slow connection speed Include inexpensive (max of 56Kbps) hardware Inconvenience Ease of setup and use Telephone line will be Widespread availability tied up while accessing the Internet  3.1.3 The Internet Connection Types of Connection and Internet Access 1) Dial-up Connections: b) ISDN (Integrated Services Digital Network) o also transfer data over ordinary telephone lines o Typically uses two phone lines to transfer data o ISDN requires a special ISDN modem ▪ Faster, but expensive ▪ Doesn’t tie up phone line ▪ Used by businesses and individuals  3.1.3 The Internet Connection Types of Connection and Internet Access 2. Broadband Internet Connection or Direct Connection(always on connections) Many home and small business users connect to the Internet via high-speed (200 Kbps) broadband Internet service. Computers are continually connected to the Internet Used in the home and office Because you are always connected, it is important to protect your computer from hackers  3.1.3 The Internet Connection Broadband vs Dial-up Broadband /Direct Dial-up Connection Slow connection speed ⚫ ⚫PC is continually connected (max of 56Kbps) but cheaper to the Internet Direct connections ⚫ Inconvenience ⚫ Because you are always ⚫ Telephone line will be tied up ⚫ connected, it is important to while accessing the Internet protect your computer from Relatively secure from hackers ⚫ hackers  3.1.3 The Internet Connection Types of Direct Connection  3.1.3 The Internet Connection DSL (Digital Subscriber Line) Broadband delivered over telephone lines o Must be less than 3 miles from a switching station o Transmits over telephone lines but does not tie up the line Fast, direct Internet access via standard telephone line ADSL is one of the more popular types of DSLs. Example: streamyx without WiFi  3.1.3 The Internet Connection Cable Internet Service/Cable Modem Cable: Most widely used home broadband connection Provides high-speed Internet access through the cable television network via a cable modem. A new technology in Malaysia  3.1.3 The Internet Connection Fixed wireless Uses radio transmission towers rather than satellites Not available in all areas. Expected to use WiMAX Provides high-speed Internet connections using a dish-shaped antenna to communicate via radio signals.  3.1.3 The Internet Connection Wi-Fi (Wireless Fidelity) Data is transmitted through radio waves. Public wireless networks o Both free and fee-based are available o Currently Wi-Fi for short range, but WiMAX may soon be an option Provide high-speed Internet connections to compatible or properly equipped wireless computers and device. Example : Streamyx with Wi-Fi  3.1.3 The Internet Connection Wi-Fi Hotspot WiFi hotspots are places that provide a user with free or paid Internet services. Eg: Airport, Café, Hotel, hostel, Offices and other public buildings.  3.1.3 The Internet Connection Satellite Internet Service Broadband option for rural areas o Slower and more expensive than cable or DSL o Available in many areas other broadband options are not Provides high-speed Internet connections via satellite. A satellite dish communicates with a satellite modem. 3.1.3 The Internet Connection 5. Satellite Internet Service  3.1.3 The Internet Connection Fiber to the Premises (FTTP) Also known as Broadband over Fiber (BoF) Delivers over fiber-optic cabling all the way to the building o Available in limited areas o Fast but expensive Uses fiber-optic cable Provide high-speed Internet access to house and business users.  3.1.3 The Internet Connection Cellular Radio Network Also known as Mobile wireless Access via mobile phone or device Offers high-speed Internet connections to devices with built-in compatible technology or computers with wireless modems. Example provider:- Celcom, Maxis, DiGi  3.1.3 The Internet Connection Common Types of Internet Connections 3.1.4 INTERNET SERVICE PROVIDER 3.1.4 Internet Service Provider Definition of Access Providers and Internet Service Provider Access Internet Service Providers Provider (ISP) A business that A company that provides provides individuals access to the Internet and other related services, and organizations such as Web site building access to the Internet and virtual hosting for free or for a fee  3.1.4 Internet Service Provider Responsibilities of an ISP Providing and maintaining a connection to the Internet Support the hardware and software needed to service that connection To protect their site and network from external threats such as viruses, hacker attacks and other illegal activities Provide 24-hour customer service and technical support 3.1.4 Internet Service Provider  3.1.4 Internet Service Provider Example of online service provider 3.1.4 Internet Service Provider Examples of ISP in Malaysia TMNet TIMENet Maxis Celcom 3.1.5 INTERNET SERVICES  3.1.5 Internet Services Types of Internet Services 1. E-mail 2. Mailing List 3. Instant Messaging 4. Chat 5. Voice over Internet Protocol (VoIP) 6. Newsgroup 7. Message Board 8. File Transfer Protocol (FTP)  3.1.5 Internet Services (1) Electronic Mail (E-mail) E-mail is the transmission of messages and files via a computer network.  3.1.5 Internet Services (1) Electronic Mail (E-mail) The message can be simple text or can include an attachment such as a word processing document, a graphic, an audio clip, or a video clip.  3.1.5 Internet Services (1) Electronic Mail (E-mail) What is an e-mail address ? An e-mail address is a combination of a user name and a domain name that identifies a user. [email protected]  3.1.5 Internet Services (1) Electronic Mail (E-mail) A user name → a unique combination of characters, such as letters of the alphabet and/or numbers, that identifies a specific user. SANGGAGAKPUTIH.BLOGSPOT.COM  3.1.5 Internet Services (2) Mailing List A mailing list is a group of e-mail names and addresses given a single name.  3.1.5 Internet Services (2) Mailing List ✓Also called an e-mail list or distribution list. ✓ When a message is sent to a mailing list, everyone on the list receives a message. [email protected]  3.1.5 Internet Services (2) Mailing List ◆To add your e-mail name and address to a mailing list, you subscribe to it. ◆ To remove your name, you unsubscribe from the mailing list.  3.1.5 Internet Services (2) Mailing List Mailing lists is one of the best ways to reach a targeted audience with each person having signed up specifically to receive information about products or services.  3.1.5 Internet Services (3) Instant Messaging Instant Messaging (IM) is a real-time Internet communications service that notifies you when one or more people are online and allows you to exchange messages or files or join a private chat room with them.  3.1.5 Internet Services (3) Instant Messaging  3.1.5 Internet Services (4) Chat A chat is a real-time typed conversation that takes place on a computer. A chat room is a location on an Internet server that permits users to chat with each other. 3.1.5 Internet Services (4) Chat 3.1.5 Internet Services (4) Chat  3.1.5 Internet Services (5) Voice over IP (VoIP) Technology that allows users to speak to other users over the Internet using their desktop computer, mobile computer, or mobile device. a.k.a Internet Telephony  3.1.5 Internet Services (5) Voice over IP (VoIP)  3.1.5 Internet Services (6) Newsgroup A newsgroup is an online area in which users have written discussions about a particular subject.  3.1.5 Internet Services (7) Message Boards Popular Web-based type of discussion group that does not require a newsreader. 3.1.5 Internet Services (7) Message Boards  3.1.5 Internet Services (8) File Transfer Protocol FTP is an Internet standard that permits file uploading and downloading with other computers on the Internet.  3.1.5 Internet Services (8) File Transfer Protocol FTP server is a computer that allows users to upload and / or download files using FTP.  3.1.5 Internet Services (8) File Transfer Protocol FTP is one method, users have to transfer Web page files from their local machine to the server.  3.1.5 Internet Services (8) File Transfer Protocol Some examples of FTP programs are: ➔ FileZilla ➔ SmarterFTP, ➔ WS_FTP  3.1.5 Internet Services (8) File Transfer Protocol 3.2 WORLD WIDE WEB 3.2.1 WEB BROWSER 60  The World Wide Web The World Wide Web, a service of the Internet The Internet was developed in the late 1960s The World Wide Web emerged in the early 1990s 61  The World Wide Web The World Wide Web (WWW), or Web, consists of a worldwide collection of electronic documents called Web pages. A Web site is a collection of related Web pages and associated items. A Web server is a computer that delivers requested Web pages to your computer. A home page is the first page of web site. 62  Web Page An electronic document on the Web, which can contain text, graphics, audio, video, animation and often has built- in connections to other documents, graphics, Web pages or Web sites. 63 63 Types of Web page 64  Web page - Static A static web page is one that is written in HTML only 65  Web page - Dynamic A dynamic web page is written using more complex code. 66 Web Site Collection of related Web pages and associated items, such as documents and pictures, stored on a Web server. 67 67  Web Browser A Web browser is an Application Software that allows users to access and view Web pages. 68 Web Browser - Icons  Web 2.0 Web 2.0 refers to Web sites that provide ✓ A means for users to share personal information (such as social networking web site) ✓ allow users to modify the web site content (blog) ✓ have software built into the site for users to use. 70 Web 2.0 Web 2.0 vs Web 1.0 Web 2.0, Internet users could just read information on web pages. With Web 2.0, users can interact with the site and add information. We can comment, share, download or create almost every content with others. In Web 1.0, the previous version, information was only written by the website author. The Internet technology which is used for Web 2.0 is not different from the old Internet technology, but the ways people use the web has changed. 3.2 WORLD WIDE WEB 3.2.2 WEB ADDRESS 72  Web Address Web address → A unique address for a web page. a.k.a URL – Uniform Resource Locator 73 Example of URL 74  URL Web address consists of : Protocol, domain name, path and web page name http:// – Hypertext Transfer Protocol – A set of rules that defines how pages transfer on the Internet 75  URL Protocol https:// – Hypertext Transfer Protocol Secure Protocol that provide communication security. Often used for payment transactions on the WWW. 76  URL Protocol → https:// 77  Examples of web address http://www.facebook.com http://www.moe.gov.my/bmkpm/ http://www.ptptn.gov.my http://www.usim.edu.my/ http://www.utusan.com.my http://webopedia.com 78  3.3 NETWORK BASICS 3.3.1 Classification of Network  3.3.1 Classification of Network a) Local area networks (LAN) b) Metropolitan area networks (MAN) c) Wide area networks (WAN)  3.3.1 Classification of Network How Are LAN, MAN, and WAN Different? The main differentiation among these classifications is their area of coverage. LAN, MAN and WAN compared  3.3.1 Classification of Network How Are LAN, MAN, and WAN Different? 3.3.1 Classification of Network LOCAL AREA NETWORK  3.3.1 Classification of Network Local Area Network (LAN): Definition A local area network (LAN) is a network that connects computers and devices in a limited geographical area. Examples: such as a home, school computer laboratory, single office building, several buildings or campus. 3.3.1 Classification of Network Example of a LAN 3.3.1 Classification of Network Local Area Network (LAN)  3.3.1 Classification of Network Local Area Network (LAN) The simplest form of LAN is to connect two computers together. COMPUTER COMPUTER 1 2  3.3.1 Classification of Network Local Area Network (LAN) A network which consists of less than 500 interconnected devices across several buildings, is still recognized as a LAN.  3.3.1 Classification of Network Local Area Network (LAN) : Advantages Easy to share devices (printers, scanners, external drives) Easy to share data (homework, pictures) Cost of LAN setup is low.  3.3.1 Classification of Network Local Area Network (LAN) : Disadvantages Area covered is limited to a few kilometres. Speed access is slow if many computers running at the same time.  3.3.1 Classification of Network METROPOLITAN AREA NETWORK  3.3.1 Classification of Network Metropolitan Area Network (MAN): Definition A metropolitan area network (MAN) is a high- speed network that connects local area networks in a metropolitan area such as a city or town and handles the bulk of communications activity across that area. 3.3.1 Classification of Network Example of a MAN  3.3.1 Classification of Network Metropolitan Area Network (MAN): Advantages efficiency and shared access data. All the computer-owning residents of the area have equal ability to go on line.  3.3.1 Classification of Network Metropolitan Area Network (MAN): Disadvantages It can be costly (hardware, software, support, etc.). As the network consists of many computers over a city, the connection can become quite slow. 3.3.1 Classification of Network WIDE AREA NETWORK  3.3.1 Classification of Network Wide Area Network (WAN): Definition A wide area network (WAN) is a network that covers a large geographic area (such as a city, country, or the world) using a communications channel that combines many types of media such as telephone lines, cables, and radio waves.  3.3.1 Classification of Network Wide Area Network (WAN) The Internet is the largest WAN in the world. 3.3.1 Classification of Network Wide Area Network (WAN): Advantages increased efficiency. ease of communication.  3.3.1 Classification of Network Wide Area Network (WAN): Disadvantages High security problems Maintenance problems. Large enterprises will dedicate personnel to maintaining their WAN.  3.3.1 Classification of Network Comparison: LAN, MAN and WAN CRITERIA LAN MAN WAN SETTING UP COST Low High Higher NETWORK SIZE Small Larger Largest SPEED Fastest Slower Slowest NUMBER OF Smallest Large Largest COMPUTERS  TASK TOPIC 3 1) What is the history about Internet? Discuss. 2)Explain about 2 type Dial Up Connections. 3)What is the types of Direct Connection. Explain 3 of the types. 4)What is Internet Service Provider? Give 3 example. 5)What is FTP? Give 1 example of FTP program. 6)Give 2 type of Web Page. Explain each of the type. 7)What is WEB 2.0? Give the example of Web 2.0. 8)Give Type3in Type of Network. MS Words Explain each type and save as “Task_YourName_GroupTutor.pdf” Example : Task_HalimatonTTSP1.pdf Submit in “Task Topic 3 Internet” in GOALS.