Internet and Information Technology (IT)


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Internet and Information Technology (IT)

  1. 1. Name : Amber Bhaumik Class : ECE-5X Roll no : E092010 Clg roll no : 90180410983
  2. 2. • • • • • • • • • • Internet History Internet Evolution How does Internet work Uses of Internet WWW(world wide web) Web Browser and Server HTTP Intranet Information Retrever Search Engine
  3. 3. • A network of networks, joining many government, university and private computers together and providing an infrastructure for the use of E-mail, bulletin boards, file archives, hypertext documents, databases and other computational resources • The vast collection of computer networks which form and act as a single huge network for transport of data and messages across distances which can be anywhere from the same office to anywhere in the world.
  4. 4. 1969 - RFCs begun by S. Crocker 1970’s - TCP by Vint Cerf & Bob Kahn Evolved into TCP/IP, and UDP 1972 - Email by Ray Tomlinson & Larry Roberts 1980s – Hardware Explosion (LANs, PCs, and workstations) 1983 – Ethernet by Metcalfe DNS – Distributed and scalable mechanism for resolving host names into IP addresses UC Berkeley implements TCP/IP into Unix BSD 1985 – Internet used by researchers and developers
  5. 5. • Via Internet, computers can contact each other • Public files on computers can be read by remote User – usually HyperText Markup Language (.html) • HTTP - HyperText Transfer Protocol • URL - Universal Resource Locator - is name of file on a remote computer
  6. 6. HTTP: HyperText Transfer Protocol Client-Server model Request-Response pattern Limitations of HTTP: Stateless, no built-in support for tracking clients (session management) No built-in security mechanisms
  7. 7. • Mosaic (1993) was first point-and-click browser • Web browsers are the software we use to view web pages • Netscape Navigator and Internet Explorer are most popular • Netscape Navigator was original, but Microsoft leveraged IE on market
  8. 8. Intranet is Intra+ Net so an Intranet is an internal or private Internet used strictly within the confines of a company, university, or organization. "Inter" means "between or among," hence the difference between the Internet and an Intranet. An Intranet is a network based on the internet TCP/IP open standard. An intranet belongs to an organization, and is designed to be accessible only by the organization's members, employees, or others with authorization. An intranet's Web site looks and act just like other Web sites,
  9. 9. • The indexing and retrieval of textual documents. • Searching for pages on the World Wide Web is the most recent “killer app.” • Concerned firstly with retrieving relevant documents to a query. • Concerned secondly with retrieving from large sets of documents efficiently.
  10. 10. To search the Internet you use what are called Internet search engines. These are easily accessed via your Internet browser (i.e. Microsoft Internet Explorer or Netscape Navigator/Communicator). Within the search engine you enter a word or phrase and it will retrieve documents from the Internet based on the information you typed in.
  11. 11. •Information Technology • Information Concepts: Data, Information, and Knowledge •Data, Information, and Knowledge •What Is an Information System?
  12. 12. Stands for "Information Technology," and is pronounced "I.T." It refers to anything related to computing technology, such as networking, hardware, software, the Internet, or the people that work with these technologies. Many companies now have IT departments for managing the computers, networks, and other technical areas of their businesses. IT jobs include computer programming, network administration, computer engineering, Web development, technical support, and many other related occupations. Since we live in the "information age," information technology has become a part of our everyday lives. That means the term "IT," already highly
  13. 13. • Data: raw facts – Alphanumeric, image, audio, and video • Information: collection of facts organized in such a way that they have additional value beyond the value of the facts themselves – Value of Information is directly linked to how it helps decision makers achieve their organization’s goals and can be measured • in time required to make a decision • Increased profits to the company
  14. 14. The Process of Transforming Data into Information
  15. 15. The Components of any Information System