Transcript DATA COMMUNITION

DATA COMMUNICATION
DONE BY:
ALVIN SAMPATH
CARLVIN SAMPATH
DATA COMMUNITION
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WWW
HTTP
URL
FTP
UPLOADING AND DOWNLOADING
WEB BROWSER
HTML/ XTML
WEB PAGE
WEB SITE
WEB SERVER
The World Wide Web (WWW), computer-based network
of information resources that combines text and
multimedia. The information on the World Wide Web
can be accessed and searched through the Internet, a
global computer network. The World Wide Web is often
referred to simply as “the Web.”
The Web started to become a popular resource after it
was first widely distributed browser provided a
convenient way to access a variety of information on the
Internet. The Web uses multimedia, which means that
information can be displayed in a wide variety of formats.
Users can read text, view pictures, watch animation, listen
to sounds, and even explore interactive virtual
environments on the Web. A user can move seamlessly
from a document or Web page stored on the computer to a
document or Web page stored on another computer.
HTTP
 Protocol for World Wide Web: the client/server
protocol that defines how messages are formatted and
transmitted on the World Wide Web. Full form
HyperText Transfer Protocol.
URL
 URL (Uniform Resource Locator), an address that points to a
particular document or other resource on the Internet, used most
frequently on the World Wide Web (WWW). A computer user can
visit an Internet document by typing its URL into a Web browser or
similar application used to access the Internet. The first part of the
URL, the part before the colon, represents the scheme, or protocol,
used to retrieve the document.
 The next part of the URL, is called the domain name. It represents
the overarching Internet address used by a particular organization
or individual. Each domain name includes an extension, which
identifies the type of organization using the address.
 URLs are case-sensitive, which means that uppercase and lowercase
letters are considered different letters, so a user has to enter a URL
with all letters in the correct case.
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FTP
 File Transfer Protocol or FTP, in computer communications, on
the Internet and other networks, a method of transferring files
from one computer to another. The protocol is a set of rules that
ensures a file is transmitted properly to the receiving computer.
A computer that stores files that can be retrieved using FTP is
called an FTP site or FTP server.
 FTP is part of the Transmission Control Protocol/Internet
Protocol (TCP/IP), the system that enables different types of
computers and networks on the Internet to communicate.
Another application, known as the File Transfer Protocol (FTP),
is used to download files from an Internet site to a user’s
computer. The FTP application is often automatically invoked
when a user downloads an updated version of a piece of software.
UPLOADING AND DOWNLOADING
 UPLOADING
 transfer data: to transfer data or programs, usually from a
peripheral computer to a central, often remote, computer
 DOWNLOADING
 to transfer or copy data from one computer to another, or to
a disk or peripheral device, or be transferred or copied in
this way
WEB BROWSER
 Web Browser, in computer science, a program that enables
a computer to locate, download, and display documents
containing text, sound, video, graphics, animation, and
photographs located on computer networks.
 A web browser downloads information over phone lines to
a user’s computer through the user’s modem and then
displays the information on the computer
HTML/ XHTML
 HyperText Markup Language (HTML) is a text-based language used to
create web pages for display by a web browser. It is a formatting language, since
it consists of codes which instruct the browser how to create, format and
display the information on the web page. The data to be displayed on the pages
is written as plain text and the formatting codes are written amongst the data
(appearing to 'mark up' the data) in the document. The marks are shown as
tags, recognised by the < > brackets around each formatting code. HTML does
not give the user information about the data on a page; it simply describes
where things go and how they work.
 Extensible HyperText Markup Language, text format, commonly known as
XML, created to structure, store, and send electronic information, especially on
the World Wide Web. In appearance, XML is similar to Hypertext Markup
Language (HTML), which is used to create pages on the Web. The main
difference between the two is that HTML determines how Web pages look
whereas XML categorizes information on a Web page. With XML it is possible
to produce an electronic document or online form that can be read by an
application, such as a Web browser, looking for such key data fields
 The use of XML is popular for business-to-business communication because it
allows companies to create XML tags unique to their industry
WEB PAGE
 WEB PAGE a computer file, encoded in HyperText Markup
Language HTML and containing text, graphics files, and
sound files, that is accessible through the World Wide Web
WEB SITE
 Web Site, in computer science, file of information located on a server
connected to the World Wide Web (WWW). The WWW is a set of
protocols and software that allows the global computer network called
the Internet to display multimedia documents.
 Web sites may include text, photographs, illustrations, video, music, or
computer programs. Web sites generally offer an appearance that
resembles the graphical user interfaces To find a web site, a user can
consult an Internet reference guide or directory, or use one of the many
freely available search engines.
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WEB SERVER
 A program providing Web pages: a program that serves
up Web pages when requested by a client, e.g. a Web
browser
BIBLIOGRAPHY
 We got our information from Encarta Encylopedia
2008.