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    Biostatistics (Basic Concept of Internet)

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    Biostatistics (Basic Concept of Internet)

    Uploaded by

    muraliammu900
    9 views13 pages

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    Biostatistics(Basic Concept of Internet)

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    Copyright:

    © All Rights Reserved
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    Download as pdf or txt
    9 views13 pages

    Biostatistics (Basic Concept of Internet)

    Uploaded by

    muraliammu900

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 13

    Basic Concept of Internet

    Deepa Anwar
    What is Internet?
    The Internet is essentially a global network of
    computing resources. You can think of the Internet
    as a physical collection of routers and circuits as a
    set of shared resources.

    Some common definitions given in the past –


    • A network of networks based on the TCP/IP
    communications protocol.
    • A community of people who use and develop
    those networks.
    Internet-Based Services-
    Some of the basic services available to Internet users are −
    Email − A fast, easy, and inexpensive way to communicate with
    other Internet users around the world.
    Telnet − Allows a user to log into a remote computer as though
    it were a local system.
    FTP − Allows a user to transfer virtually every kind of file that
    can be stored on a computer from one Internet-connected
    computer to another.
    UseNet news − A distributed bulletin board that offers a
    combination news and discussion service on thousands of
    topics.
    World Wide Web (WWW) − A hypertext interface to Internet
    information resources.
    What is WWW?

    WWW stands for World Wide Web. A technical definition of


    the World Wide Web is − All the resources and users on the
    Internet that are using the Hypertext Transfer Protocol
    (HTTP).
    A broader definition comes from the organization that Web
    inventor Tim Berners-Lee helped found, the World Wide Web
    Consortium (W3C): The World Wide Web is the universe of
    network-accessible information, an embodiment of human
    knowledge.
    In simple terms, The World Wide Web is a way of exchanging
    information between computers on the Internet, tying them
    together into a vast collection of interactive multimedia
    resources.
    What is HTTP?
    HTTP stands for Hypertext Transfer Protocol. This is the
    protocol being used to transfer hypertext documents that
    makes the World Wide Web possible.
    A standard web address such as Yahoo.com is called a URL and
    here the prefix http indicates its protocol.

    What is URL?
    URL stands for Uniform Resource Locator, and is used to
    specify addresses on the World Wide Web. A URL is the
    fundamental network identification for any resource
    connected to the web (e.g., hypertext pages, images, and
    sound files).
    A URL will have the following format −

    protocol://hostname/other_information

    The protocol specifies how information is transferred from a


    link. The protocol used for web resources is HyperText
    Transfer Protocol (HTTP). Other protocols compatible with
    most web browsers include FTP, telnet, newsgroups, and
    Gopher.
    The protocol is followed by a colon, two slashes, and then the
    domain name. The domain name is the computer on which
    the resource is located.
    Links to particular files or subdirectories may be further
    specified after the domain name. The directory names are
    separated by single forward slashes.
    What is Website?

    Currently you are on our website . which is a


    collection of various pages written in HTML
    markup language. This is a location on the web
    where people can find tutorials on latest
    technologies. Similarly, there are millions of
    websites available on the web.
    Each page available on the website is called a web
    page and first page of any website is called home
    page for that site.
    What is Web Server?

    Every Website sits on a computer known as a Web


    server. This server is always connected to the
    internet. Every Web server that is connected to the
    Internet is given a unique address made up of a
    series of four numbers between 0 and 256
    separated by periods. For example, 68.178.157.132
    or 68.122.35.127.
    When you register a Web address, also known as a
    domain name,you have to specify the IP address of
    the Web server that will host the site.
    What is Web Browser?

    Web Browsers are software installed on your PC. To


    access the Web you need a web browsers, such as
    Netscape Navigator, Microsoft Internet Explorer or
    Mozilla Firefox.
    Currently you must be using any sort of Web
    browser while you are navigating through any site
    On the Web, when you navigate through pages of
    information this is commonly known as browsing or
    surfing.
    What is SMTP Server?

    SMTP stands for Simple Mail Transfer Protocol Server. This


    server takes care of delivering emails from one server to
    another server. When you send an email to an email
    address, it is delivered to its recipient by a SMTP Server.

    What is ISP?

    ISP stands for Internet Service Provider. They are the


    companies who provide you service in terms of internet
    connection to connect to the internet.
    You will buy space on a Web Server from any Internet
    Service Provider. This space will be used to host your
    Website.
    What is HTML?

    HTML stands for Hyper Text Markup Language. This is the


    language in which we write web pages for any Website.
    This is a subset of Standard Generalized Mark-Up Language
    (SGML) for electronic publishing, the specific standard used
    for the World Wide Web.

    What is Hyperlink?

    A hyperlink or simply a link is a selectable element in an


    electronic document that serves as an access point to other
    electronic resources. Typically, you click the hyperlink to
    access the linked resource. Familiar hyperlinks include
    buttons, icons, image maps, and clickable text links.
    What is DNS?

    DNS stands for Domain Name System. When


    someone types in your domain name,
    www.example.com, your browser will ask the
    Domain Name System to find the IP that hosts
    your site. When you register your domain name,
    your IP address should be put in a DNS along with
    your domain name. Without doing it your domain
    name will not be functioning properly.
    What is W3C?

    W3C stands for World Wide Web Consortium


    which is an international consortium of companies
    involved with the Internet and the Web.
    The W3C was founded in 1994 by Tim Berners-Lee,
    the original architect of the World Wide Web. The
    organization's purpose is to develop open standards
    so that the Web evolves in a single direction rather
    than being splintered among competing factions.
    The W3C is the chief standards body for HTTP and
    HTML.

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