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Sistem Jaringan dan Komunikasi Data #13 Internet, Intranet, dan Ekstranet.

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Presentation on theme: "Sistem Jaringan dan Komunikasi Data #13 Internet, Intranet, dan Ekstranet."— Presentation transcript:

1 Sistem Jaringan dan Komunikasi Data #13 Internet, Intranet, dan Ekstranet

2 Principles of Information Systems, Ninth Edition 2 Principles and Learning Objectives  The Internet is like many other technologies—it provides a wide range of services, some of which are effective and practical for use today, others that are still evolving, and still others that will fade away from lack of use  Briefly describe how the Internet works, including alternatives for connecting to it and the role of Internet service providers

3 Principles of Information Systems, Ninth Edition 3 Principles and Learning Objectives (continued)  Originally developed as a document- management system, the World Wide Web is a hyperlink-based system that is easy to use for personal and business applications  Describe the World Wide Web and how it works  Explain the use of Web browsers, search engines, and other Web tools  Identify and briefly describe the applications associated with the Internet and the Web

4 Principles of Information Systems, Ninth Edition 4 Principles and Learning Objectives (continued)  Because use of the Internet and World Wide Web is becoming universal in the business environment, management, service and speed, privacy, and security issues must continually be addressed and resolved  Identify who is using the Web to conduct business and discuss some of the pros and cons of Web commerce  Outline a process for creating Web content

5 Principles of Information Systems, Ninth Edition 5 Principles and Learning Objectives (continued)  Describe Java and discuss its potential impact on the software world  Define the terms intranet and extranet and discuss how organizations are using them  Identify several issues associated with the use of networks

6 Principles of Information Systems, Ninth Edition 6 Use and Functioning of the Internet  ARPANET  Ancestor of the Internet  Project started by the U.S. Department of Defense (DoD) in 1969

7 Principles of Information Systems, Ninth Edition 7 How the Internet Works  Transmission Control Protocol (TCP)  Transport-layer protocol that most Internet applications use with IP  Backbone  One of the Internet’s high-speed, long- distance communications links  Uniform Resource Locator (URL)  An assigned address on the Internet for each computer

8 Principles of Information Systems, Ninth Edition 8 How the Internet Works (continued)  Internet Corporation for Assigned Names and Numbers (ICANN)  Responsible for managing IP addresses and Internet domain names  Has authority to resolve domain name disputes  Cyber-squatters  Register domain names in the hope of selling them to corporations or people

9 Principles of Information Systems, Ninth Edition How the Internet Works (continued)  Accessing the Internet  Connect via LAN Server  Connect via Dial-up  Connect via High-Speed Service  Connect Wirelessly

10 Principles of Information Systems, Ninth Edition How the Internet Works (continued)

11 Principles of Information Systems, Ninth Edition 11 Internet Service Providers  Any company that provides individuals or organizations with access to the Internet  Most charge a monthly fee

12 Principles of Information Systems, Ninth Edition 12 The World Wide Web  Collection of tens of millions of server computers that work together as one in an Internet  Hyperlink  Highlighted text or graphics in a Web document that, when clicked, opens a new Web page  Web browser  Web client software such as Internet Explorer, Firefox, and Safari used to view Web pages

13 Principles of Information Systems, Ninth Edition The World Wide Web (continued)

14 Principles of Information Systems, Ninth Edition 14 The World Wide Web (continued)  Hypertext Markup Language (HTML)  Standard page description language for Web pages  HTML tags  Let the browser know how to format text  Extensible Markup Language (XML)  Markup language for Web documents containing structured information  Cascading Style Sheet (CSS)  File or portion of an HTML file that defines the visual appearance of content in a Web page

15 Principles of Information Systems, Ninth Edition Web 2.0 and the Social Web  Web 2.0  The Web as a computing platform that supports software applications and the sharing of information  Rich Internet application  Software that has the functionality and complexity of traditional application software, but runs in a Web browser and does not require local installation

16 Principles of Information Systems, Ninth Edition 16 Web Programming Languages  Java  Object-oriented programming language from Sun Microsystems based on C++  Allows small programs (applets) to be embedded within an HTML document  Other languages  Asynchronous JavaScript and XML (AJAX)  Hypertext Preprocessor (PHP)  Adobe Flash and Microsoft Silverlight

17 Developing Web Content  Popular tools for creating Web pages and managing Web sites:  Adobe Dreamweaver, Microsoft Expression Web, and Nvu  Popular publishing options:  ISPs, free sites, and Web hosting  Mash-up  Process of mixing two or more hip-hop songs into one song Principles of Information Systems, Ninth Edition 17

18 Principles of Information Systems, Ninth Edition 18 Web Services  Standards and tools that streamline and simplify communication among Web sites  XML  The key to Web services

19 Principles of Information Systems, Ninth Edition 19 Web Services (continued)  Other components used in Web service applications:  SOAP (Simple Object Access Protocol)  WSDL (Web Services Description Language)  UDDI (Universal Discovery Description and Integration)

20 Principles of Information Systems, Ninth Edition Internet and Web Applications  Search engines and Web research  Search engines  Have become important to businesses as a tool to drive visitors to the business’ Web site  SEO has become a valuable marketing tool

21 Principles of Information Systems, Ninth Edition Search Engines and Web Research

22 Principles of Information Systems, Ninth Edition 22 Business Uses of the Web  Commercial Internet Exchange (CIX) Association  Established in 1991  Allows businesses to connect to the Internet

23 Principles of Information Systems, Ninth Edition 23 , Instant Messaging, and Video Chat   No longer limited to simple text messages  Can embed sound and images  Can attach files  Instant messaging  Online, real-time communication between two or more people who are connected to the Internet

24 Principles of Information Systems, Ninth Edition , Instant Messaging, and Video Chat (continued)

25 Career Information and Job Searching  Search engines  Good starting point for searching for specific companies or industries  Job sites     Principles of Information Systems, Ninth Edition 25

26 Principles of Information Systems, Ninth Edition 26 Telnet, SSH, and FTP  Telnet  Network protocol that enables users to log on to networks remotely over the Internet  Secure Shell (SSH)  Provides Telnet functionality through a more secure connection  File Transfer Protocol (FTP)  Supports file transfers between a host and a remote computer

27 Principles of Information Systems, Ninth Edition 27 Web Log (Blog), Video Log (Vlog), and Podcasting  Web log (blog)  Web site that people create and use to write about their observations, experiences, and feelings on a wide range of topics  Podcast  Audio broadcast over the Internet  An audio blog

28 Principles of Information Systems, Ninth Edition 28 Usenet and Newsgroups  Usenet  Uses to provide a centralized news service  Topic are called newsgroups  Protocol that describes how groups of messages can be stored on and sent between computers

29 Principles of Information Systems, Ninth Edition

30 30 Chat Rooms  Enable two or more people to engage in interactive “conversations” over the Internet  Internet Relay Chat (IRC)  Requires participants to type their conversation rather than speak

31 Principles of Information Systems, Ninth Edition 31 Internet Phone and Videoconferencing Services  Internet phone service  Relatively inexpensive, especially for international calls  Voice-over-IP (VoIP) technology  Network managers can route phone calls and fax transmissions over the same network they use for data  Internet videoconferencing  Supports both voice and visual communications

32 Social Networks  Facebook  Provides an application development platform so that technically proficient members can create applications to run within Facebook  The U.S. intelligence community  Is adopting social networking to share information among operatives and analysts  Twitter  Allows members to report on what they are doing throughout the day Principles of Information Systems, Ninth Edition

33 Media Sharing  YouTube  Allows members to post homemade video content  Flickr  Allows members to upload photos to their own personal online photo album and choose photos to share with the community

34 Principles of Information Systems, Ninth Edition Social Bookmarking  Purpose  To provide a view of the most popular Web sites, videos, blog articles, or other Web content at any given moment  Popular social bookmarking sites  del.icio.us  Digg

35 Principles of Information Systems, Ninth Edition Content Streaming  Method for transferring multimedia files, radio broadcasts, and other content over the Internet  Enables users to browse large files in real time

36 Principles of Information Systems, Ninth Edition 36 Shopping on the Web  Amazon Shorts  Has stories that vary in length from 2,000 to 10,000 words  Bot (intelligent agent)  Software tool that searches the Web for information, products, or prices

37 Principles of Information Systems, Ninth Edition 37 Web Auctions  Web auction  A way to connect buyers and sellers  eBay  Popular auction site  Easy to use and includes thousands of products and services in many categories  Auction sites  Cannot always determine whether the people and companies listing products and services are legitimate

38 Principles of Information Systems, Ninth Edition 38 Music, Radio, Video, and TV on the Internet  Radio broadcasts are now available on the Internet  Video and TV are also becoming available  Internet Protocol Television (IPTV) protocol  Used to put TV programming on the Internet

39 Principles of Information Systems, Ninth Edition E-Books and Audio Books  Digital books, both in text and audio form  Are growing in popularity thanks to appealing devices and services  Audio books  Have become more popular due to the popularity of the iPod and services like audible.com

40 Principles of Information Systems, Ninth Edition 40 Office on the Web  Internet office  Web site that contains files, phone numbers, addresses, an appointment calendar, and more  Allows your desktop computer, phone books, appointment schedulers, and other important information to be with you wherever you are

41 Principles of Information Systems, Ninth Edition 41 Other Internet Services and Applications  Internet  Can provide critical information during times of disaster  Can be used to translate words, sentences, or complete documents from one language into another  Facilitates distance learning, which has dramatically increased in the last several years

42 PartnerOur Company Intranet Extranet Internet

43 Principles of Information Systems, Ninth Edition 43 Intranets and Extranets  Intranet  Internal corporate network built using Internet and World Wide Web standards and technologies  Extranet  Network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners  Virtual private network (VPN)  Secure connection between two points on the Internet

44 Principles of Information Systems, Ninth Edition Intranets and Extranets (continued)

45 45 What is an Extranet?  An extranet is a private network that uses Internet protocols and the public telecommunication system to securely share part of a business's information or operations with suppliers, vendors, partners, customers, or other businesses.  An extranet can be viewed as part of a company's Intranet that is extended to users outside the company.  The same benefits that Web technologies have brought to corporate Intranets are now starting to accelerate business between businesses.

46 46 More on Extranets  Extranets can be used to exchange large volumes of data, share product catalogues, share news with trading partners, collaborate with other companies on joint development efforts, jointly develop and share training programs with other companies, provide or access applications between companies, and much more.  It may sound like a technology for geeks only. But many people use extranets every day without realizing it--to track packaged goods, order products from their suppliers or access customer assistance from other companies.

47 47  Log on to the FedEx site to check the status of that package you sent this morning, for example, and you've just used an extranet in one of its simplest forms.  An extranet is a mechanism based on Internet and Web technology for communicating both privately and selectively with your customers and business partners. More on Extranets

48 48 Differences between an Extranet, an Intranet and the Internet?  First there was the Internet, which is available for everyone to use. Then businesses got smart and started developing their own intranets that used the same friendly Web interface but put up firewalls so that only employees could see the information on the site. Finally, the intranet was created.  It finds itself somewhere in between—there's still a firewall, but you allow only selected outsiders, such as business partners and customers, inside.

49 49 Why would you use Extranets?  When done correctly, extranets provide a safe way to allow transactional business-to-business activities and can save your company some serious time and money.  The automotive industry uses extranets to cut down on its redundant ordering processes and keep suppliers up to date on parts and design changes, allowing quicker response times to suppliers' problems and questions.  Suppliers can receive proposals, submit bids, provide documents, even collect payments through an extranet site.  An extranet has restricted (password-protected) access, so it may be connected directly to each party's internal systems.

50 50 Does every Company Need one?  Many view extranets as the next era in Web development.  While other business-to-business communications, such as electronic data interchange (EDI), are out there, an extranet is more user-friendly because of its Web interface and allows for less regimented and more ad-hoc inquiries.  Before a company can make an attempt at harnessing the capabilities and profits gained from using an extranet, a fully functioning intranet has to be in place.  In time, companies may be forced to use an extranet with their suppliers and customers.  Even now, some large corporations say they will not do business with companies that won't be connected to a secure extranet in the coming years.

51 51 Disadvantages of Extranets  The benefits of extranets, such as reduced time to market and cost of doing business, and faster access to partner information, may be outweighed by the costs—security, Web servers and development, legacy systems integration, ongoing support and maintenance.  Extranets require a large amount of IS time and energy, much more than what it takes to get an intranet or Web site up and running, which may place it at the bottom of the IS group's to-do list.

52 Principles of Information Systems, Ninth Edition 52 Net Issues  Management issues  Preventing attacks  Service and speed issues  Keeping up with Internet traffic and traffic on company intranets  Privacy, fraud, security, and unauthorized Internet sites  People and companies are reluctant to embrace the Internet unless these issues are successfully addressed


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