Sistemas de Informaçãopara a Indústria                                                      Class 4                       ...
The InternetThe Internet is a global system of interconnected computer networks that use thestandard Internet protocol sui...
The InternetSince the mid-1990s the Internet has had a tremendous impact on culture andcommerce, including the rise of nea...
Internet ServicesThe Internet has several services available which can be used commerce,entertainment, professional collab...
Internet GovernanceThere is no formal management of the Internet Services, nor there is muchcontrol over the activities de...
Internet Client Server Architecture                                                    Sistemas de Informação para Indústr...
The World Wide Web (WWW) One of the most popular services on the Internet, is the Web and their main protocols enabling th...
Domain Name System (DNS)                                                    Sistemas de Informação para Indústria   8 Depa...
Voice over Internet Protocol (VoIP)                                                    Sistemas de Informação para Indústr...
Virtual Private Networks (VPN) using the Internet                                                    Sistemas de Informaçã...
Web 2.0                                                    Sistemas de Informação para Indústria   11 Departamento de Enge...
Future Internet Challenges-     Cloud Computing-     Big Data-     Internet of Things-     Semantic Web / Web 3.0-     Mob...
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Aula 4 21032013 sii-v1

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Aula 4 21032013 sii-v1

  1. 1. Sistemas de Informaçãopara a Indústria Class 4 The Internet Ano 2013 António Grilo Prof. Auxiliar FCT-UNL Sistemas de Informação para Indústria 1Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  2. 2. The InternetThe Internet is a global system of interconnected computer networks that use thestandard Internet protocol suite (often called TCP/IP, although not all protocols useTCP) to serve billions of users worldwide. It is a network of networks that consistsof millions of private, public, academic, business, and government networks, oflocal to global scope, that are linked by a broad array of electronic, wireless andoptical networking technologies.The origins of the Internet reach back to research of the 1960s, commissioned bythe United States government in collaboration with private commercial interests tobuild robust, fault-tolerant, and distributed computer networks. The funding of a newU.S. backbone by the National Science Foundation in the 1980s, as well as privatefunding for other commercial backbones, led to worldwide participation in thedevelopment of new networking technologies, and the merger of many networks.The commercialization of what was by the 1990s an international network resultedin its popularization and incorporation into virtually every aspect of modern humanlife. As of 2011, more than 2.2 billion people — nearly a third of Earths population— use the services of the Internet. Sistemas de Informação para Indústria 2 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  3. 3. The InternetSince the mid-1990s the Internet has had a tremendous impact on culture andcommerce, including the rise of near instant communication by email, instantmessaging, Voice over Internet Protocol (VoIP) "phone calls", two-way interactivevideo calls, and the World Wide Web with its discussion forums, blogs, socialnetworking, and online shopping sites. Increasing amounts of data are transmittedat higher and higher speeds over fiber optic networks operating at 1-Gbit/s, 10-Gbit/s, or more.During the late 1990s, it was estimated that traffic on the public Internet grew by100 % per year, while the mean annual growth in the number of Internet users wasthought to be between 20% and 50%. This growth is often attributed to the lack ofcentral administration, which allows organic growth of the network, as well as thenon-proprietary open nature of the Internet protocols, which encourages vendorinteroperability and prevents any one company from exerting too much controlover the network. It is estimated that in 1993 the Internet carried only 1% of theinformation flowing through two-way telecommunication, by 2000 this figure hadgrown to 51%, and by 2007 more than 97% of all telecommunicated informationwas carried over the Internet. Sistemas de Informação para Indústria 3 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  4. 4. Internet ServicesThe Internet has several services available which can be used commerce,entertainment, professional collaboration, professional or personalcommunication, etc:· E-mail· Chatting and instant messaging· Newsgroups· Telnet· File Transfer Protocol (FTP)· World Wide Web· Voice over IP (VoIP)· Unified communications· Virtual private networks (VPNs) Sistemas de Informação para Indústria 4 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  5. 5. Internet GovernanceThere is no formal management of the Internet Services, nor there is muchcontrol over the activities developed over the Internet.Policies are established by professional, government organizations likeIAB, ICANN, W3C. The Internet governance organizations influencegovernment agencies, network owners, ISPs and software developers withthe goal of keeping the Internet operating as efficiently as possible. TheInternet must also conform to the laws of the nations in which it operates,as well as the technical infrastructures that exist within the nations.IP addresses currently in use, such as 208.55.112.34 are part of aspecification called IP v 5. However, given the growth rate of the Internet,there aren’t enough IP addresses in this scheme to last beyond 2013. IP v6 is a revised addressing convention that will provide over a quadrillionaddresses. Sistemas de Informação para Indústria 5 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  6. 6. Internet Client Server Architecture Sistemas de Informação para Indústria 6 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  7. 7. The World Wide Web (WWW) One of the most popular services on the Internet, is the Web and their main protocols enabling the Web. The Web is an interlinked connection of Web sites, which are collections of Web pages linked to a home page. These pages are programmed using HTML, and transmitted to user’s Web browsers by HTTP. Web page addresses (URLs) are composed of the domain name of the web site and the file location of the individual web page HTML (Hypertext Markup Language) formats documents for display on Web. Hypertext Transfer Protocol (HTTP) is a communications standard used for transferring Web pages. Uniform resource locators (URLs) are addresses of Web pages, e.g., http://www.unidemi.com/sii Web servers are software for locating and managing Web pages. The Domain Name System (DNS) is a hierarchical system with a root domain, top- level domains, second-level domains, and host computers at the third level. Sistemas de Informação para Indústria 7 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  8. 8. Domain Name System (DNS) Sistemas de Informação para Indústria 8 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  9. 9. Voice over Internet Protocol (VoIP) Sistemas de Informação para Indústria 9 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  10. 10. Virtual Private Networks (VPN) using the Internet Sistemas de Informação para Indústria 10 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  11. 11. Web 2.0 Sistemas de Informação para Indústria 11 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
  12. 12. Future Internet Challenges- Cloud Computing- Big Data- Internet of Things- Semantic Web / Web 3.0- Mobile Computing- Gamification- … Sistemas de Informação para Indústria 12 Departamento de Engenharia Mecânica e Industrial © António Grilo 2013
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