Transcript Introduction to IE, WorldWideWeb and The Internet

Introduction to Internet, WWW
and IE
What is Internet
The Internet means differently to
different people. According to Ed Krol, it
is a network of networks based on the
TCP/IP protocols
 a community of people who use and
develop those networks
 a collection of resources that can be
reached from those networks

Internet Applications (1)



E-mail is a means of communication on the
Internet, most mail systems use MIME protocol to
allow the delivery of rich mail messages.
Telnet, or remote login, allows your computer to
login to a remote computer and act as though it
were a local terminal attached to that computer.
Ftp allows you to transfer files from or to a remote
computer. It is commonly used to download
software. ftp sites can be accessed with URL starting
with ftp (e.g. ftp://ftp.stfx.ca)
Internet Applications(2)


Newsgroups: use Usenet to share discussions on a
specific topic. Ex: rec.arts.books is a group for the
discussion of books and book reviews. xnews.stfx.ca
is a newsgroup in St.F.X for class discussion, and
general information about the University. Can be
accessed by using the Collabra in Communicator
software suite
WWW: provides access to a rich universe of
information and computer data, and is the basis for
much of today's Internet activity
Internet History




ARPAnet first created for military and scientific use, 4
computers
Originally, only UNIX based programs such as Telnet,
FTP, Archie, and Gopher can locate and download
sites and files, only plain text can be transmitted
In 1991, the WWW (World Wide Web)(The Web) was
introduced. This could deliver pictures, sound, and
video to a client requesting it from a server.
Http: a standard protocol (HyperText Transfer
Protocol)
Home Pages

Before we start creating homepages we
must know the following terms
– Web page
– Site
– Home page
– Servers
– Links
– Frames
Home Pages
Web page - a single text file written in
HTML.
 Site - A collection of web pages
belonging to a single individual or
company
 Home page - a special web page that
servers as the “door” for the rest of the
site. It is the main page for the site.

Home Pages
Servers - Dedicated computers that are
connected to the internet 24 hours a
day. - so anyone in the world can reach
your web page at anytime.
 Links - By clicking on a link you can
jump to another web page either at the
same cite or at another one.

Home Pages
Frames - a regular web page that has
been show-horned into a smaller area
within another web page, called a
frameset.
 Frameset - contains information about
the size of the frames within it,
including their sizes, names, scrolling
qualities, and URLs
 Examples

URL
URL stands for Uniform Resource Locator ;
 Any URL that begins with http is a WWW
site. Any URL that begins with FTP is a File
transfer Protocol site.
 Ex: http://www.stfx.ca/people/lyang/index.html

(hypertext) (Web Site) (---Path----)( Document ) .
URL
http://www.vttourist.com/vt/usa.htm
Document
Path
Internet Address (Web site)
Means of access,
HyperText Transfer Protocol
5
Entering URLs



1) Type the whole URL into the Location Box
2) If the beginning is www and the ending is
com, just type in what's in between such as
yahoo for www.yahoo.com
3.) To return to sites you have been before, click
on Back or Go, cllicking on Bookmarks or
History (CTRL + H) can find more

4) File® Open Location® type in URL

5) Search by filling in query and then click on
links brought up by search
Unable to locate server?
Incorrect URL
 Site is too busy
 Site has disappeared

Some Buttons
Back to previous site,
 Forward to next site,
 Stop to stop loading sites,
 Home is to designated startup page,
which can be changed to your own
choice: EDIT® Preferences®
Navigator® type the URL of the Home
Page you want in the Location Box.

Save Web-document
Click on FILE --> Save as, type in the
folder name (or browse and select the
folder) where you want to save the webdocument.
 Choose the document type (.txt or .html).
 To save an image from web, Rt. click on
image® Save Image As® select drive
and name of file® Save.

Printing a Web Page
First preview ® File ® Print Preview ®
 Print only pages you need or Copy and
Paste sections to Word and print from
Word.

Finding text in a page
Finding text in long document :- CTRL
+ F ® fill in text you are looking for or
click on Edit and then click on Find in
the page.
 You can choose to find upward or
downward.
 You can also choose to have casematch or not.

Bookmarks




Bookmarks - can be added all in a large list or
organized into folders (better)
Add a bookmark folder: Click on Bookmarks®
EDIT ® FILE ® NEW FOLDER® type name.
To add bookmarks to a certain folder: Click
on Bookmarks ® FILE® select folder in which
you want to place them.
To change bookmark properties: Click on
Bookmarks ® EDIT ® BOOKMARK
PROPERTIES.
Change Preference
EDIT® Preferences®;
 Ex: EDIT® Preferences® Cache® is to
set limits or clear Disk Cache and
Memory Cache ;
 Ex: set HOME.

Searching on the Web
Search Engines- help to find sites
related to a specific topic.
 One enters queries or keywords, search
engine will return many links containing
those words. Some will rank the
relevancy of the links depending on
how many times the words appeared in
the pages.

Search Engine




Each Search engine builds a database of web
pages.
Some engines: Google, Altavista, Yahoo,
Infoseek, Excite
Google and Altavista return the links containing
the keywords. It brings back too many irrelevant
hits, it is best used for very specific information.
Yahoo categorizes data and then let you search
when the topic has been narrowed down
somewhat producing more relevant results.
Search Technique
A search engine has its own searching rules.
 A good guide:

http://www.windweaver.com/searchguide.htm

Some tips:
– Use quotes around a string of words,
– Use AND , OR, and NOT to narrow down the
topic,
– Use + (-) in front of words to make sure the
word is included (excluded).
Electronic Mail (E-mail)
E-mail is sending messages via computer
 Business is using more e-mail and fax
 To access you must have a mail server
and software
 Each person has a username and
password
 All mail programs allow you to Send,
Compose, Reply and Forward, Delete

Internet Address
[email protected]
Highest-level
domain
Username
Next-level domain
Host Computer
A valid Internet Address must contain the @ symbol
E-mail Protocols
POP Client --Post Office Protocol
•Mail is read composed and stored locally
•Can work off-line
IMAP --Messages stored remotely
•Stored on a server
•Download for local storage
SMTP --Simple Mail Transfer Protocol
•The protocol required to send mail messages
through the Internet