3.2 The Internet 3.2.2 World Wide Web (Web Browser & Web Address)
3.2 The Internet
3.2.2 World Wide Web
(Web Browser & Web Address)
• Web browser is an application software that
allows users to access and view Web pages.
• When a user click or start a Web browser it
will display the first page of a Website called
• Home page setting can be changed using the
Examples of Web browser:
– Google Chrome
– Mozilla Firefox
– Internet Explorer
*Components of Web Address
– A set of rules that defines how pages transfer on
• Types of protocol:
– http (Hypertext Transfer Protocol)
a standard set of rules that defines how pages
transfer on the Internet.
– https (Hypertext Transfer Protocol Secure)
a protocol for secure communication over a
• Domain name
– Address of the computer that contains the Web
site (IP address)
– Directories or folders that contains the files being
Web Page Name
– the name of the file that is being accessed
• Web address is a unique address for a Web
• Also called a Uniform Resource Locator (URL)
• Examples of Web address:
*World Wide Web
• The World Wide Web (www), or the Web,
consists of a worldwide collection of
electronic documents (or Webpages).
• The World Wide Web is one of the Internet
*Web Page and Web Site
• Web page
refers to an electronic document on
the Web which can contain text, graphics,
animation, audio, and video.
is a collection of related Web pages
and associated items such as documents and
pictures, stored on a Web server.
*Web Server and DNS Server
• Web server
is a computer that stores Web
pages and delivers requested Web pages to
• DNS server
is a computer that translates the
domain name to its associated IP address
How a Web Browser Displays a Home Page
User clicks Web browser icon.
Web browser looks up for its home page setting.
Web browser communicates with DNS server,
which translates the domain name of home
page to IP address and then sends IP address to
Web browser uses the IP address to request the
home page from the Web server associated with
the home page.
The web server sends the home page to Web
browser, which then displays it on the screen.