www.pptx

By: Asst. Lec. Afrah Salman Dawood

 Internet and world wide web (www)
 Exploring www
 Internet service provider
 Web site
 Web page construction
 Web server
 Web browser

 The Internet or “Net” (network of networks) is
the largest computer network in the world
that connects billions of computer users.
 The word internet comes from combination
between “interconnection” and “Network”.
 Network is a collection of computers and
devices connected via communication
channels and transmission media allow to
share resources (hardware, software, data,
information).
 Generally nobody own internet.

 The World Wide Web, commonly known as the
Web, is a system of interlinked hypertext/
hypermedia documents accessed via the
Internet.
 Hypertext is text displayed on a computer or
other electronic device with link to other text
that the reader can immediately access.
 Hypermedia is used as a logical extension of the
term hypertext in which graphics, audio, video,
plain text and hyperlinks.
 Creator: Timm Berners-Lee, 1989.

 Internet = collection of networks that
connect millions of businesses, government
agencies, educational institutions, and
individuals.
 WWW = the means we use to access
information over the internet
 Different communication protocols
 Special link (hyperlink) that enable users to jump
from one place to another on the web.

 The web is the global networked information
system of interlinked computer networks
that serves files formatted in HTML, XML,
PDF, DOC, and other file types.
 A document can be static (prepared and
stored in advance) or dynamically generated
(in response to user input).

 Acedemic, educational
 Business related (B2C, B2B, B2A, etc…)
 Personal

 An Internet service provider (ISP), also
sometimes referred to as an Internet access
provider (IAP), is a company that offers its
customers access to the Internet.

 You must be able to reach all destinations on
the net.
 Your packets have to get delivered to every
destination.
 Packets from everywhere else have to “find
you”. This is done by having your ISP(s)
advertise routes for you.

 A set of related web pages, images, videos,
texts or other digital assets typically served
from a single web domain.
 It can be accessed from a common URL
called homepage.
 A web page is a resource of information
(HTML or XHTML) that is suitable for the
www and can be accessed through a web
browser.
 Web pages are requested and served from
web servers using HyperText Transfer
Protocol (HTTP).

 www.google.com
 www.slideshare.net
 www.uotechnology.edu.iq
 www.youtube.com
 https://www.usa.gov/

 What you need:
 Any text editor to write HTML (NotePad Pro,
Adobe HomeSite, Dreamweaver, etc.)
 A web browser to view web pages through
development (chrome, firefox, opera, etc.
 Web hosting space: a place to save finished
website.
 A domain name: necessary for professional or
commercial sites.
 A program for uploading websites: called File
Transfer Protocol (FTP) program

 HTML (HyperText Markup Language) is the
language in which web pages are written.
 Tags are pieces of HTML code: For example, to
make a word, sentence or paragraph bold, we
simply add tags: <b>word</b>
 Web pages (individual pages in a website) should
be saved with either .html or .htm extension:
page.html or page.htm

 A Web server is a program that generates and
transmits responses to client requests for
Web resources.

 The server can generate the response
message in a variety of ways:
1. The server simply retrieves the file associated
with the URL and returns the contents to the
client.
2. The server may invoke a script that
communicates with other servers or a back-end
database to construct the response message

 A web browser (commonly referred to as a
browser) is a software application for
retrieving, presenting and traversing
information resources on the World Wide
Web.

 Most browsers support HTTP Secure and offer
quick and easy ways to delete the web
cache, cookies. and browsing history. For a
comparison of the current security
vulnerabilities of browsers, see comparison
of web browsers.

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