Transcript 1-Applications

Internet Research
Internet Applications
The Internet is not the Web
• Because of the great popularity of
the World Wide Web, people think
the Internet is the Web or the Web
is the Internet.
• The Web is the networked
collection of texts, images, sound
and video on the Internet.
• But the Web is just one application
of Internet technology.
Email
• Because most people get
electronic mail through their
Web browsers, they think email
is part of the Web.
• But email is technically a
separate application of Internet
technology.
• People can get email even with
limited Internet access.
FTP
• FTP – File Transfer Protocol –
is another important Internet
application.
• This protocol is the language
computers use to move files
from one computer to another.
• When you move web pages
from your home computer to a
server, you probably use FTP.
Gopher and Telnet
• You may have heard of
older applications, such as
Gopher or Telnet.
• Telnet is software that logs
you onto a remote
computer and allows you to
use that computer.
• Gopher is an early browser
that allows you to search
and request text with
menus.
Chat
• People also use the Internet to
chat in real time – just like on
the phone.
• Much of this is made possible
by the Internet Relay Chat
(IRC) network.
• Other client software, such as
AOL Instant Messenger, also
allows chat.
The Primacy of the Web Page
• Other Internet applications
are important. But the World
Wide Web has become the
dominant force on the
Internet.
• The Web page is now one of
the most crucial ways in
which information is stored
and retrieved.
HTML
• Understanding how a
web page is put together
can aid Internet research.
• Tags, or codes, are
embedded in a document
intended for the Web.
• The code is based on
HyperText Markup
Language: HTML.
Hypertext
• The HTML codes in the Web
page tell your browser how
the page should look.
• Codes cover everything from
fonts to the size of pictures.
• The codes also can link text
to another web page on a
totally different computer.
Such text is called hypertext.
File types: jpegs to gifs
• The Web can also send and receive non-HTML
files. Other files types:
• doc is a Microsoft Word document
• gif (Graphics Interchange Format) is often a
graphic
• jpeg (Joint Photographers Expert Group) is often
a photograph
• pdf (Portable Document Format) preserves the
original look of a document, almost like a
photocopy.
One in a million
• Each Web page is
made up of HTML
codes and perhaps
some of the other file
types.
• Internet research often
comes down to finding
the right Web page –
out of millions.