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Internet StFX Faculty and Staff Home

VIEWS: 2 PAGES: 34

									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/mlin/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
    Type the whole URL into the Location Box
   File® Open Location® type in URL
   To return to sites you have been before, click on
    Back or Go, cllicking on Bookmarks or
    History (CTRL + H) can find more
   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: Tools: Options 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 web-
  document.
 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 case-
  match or not.
               Bookmarks
   in Netscape
    – 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.
   In IE: Favorite
    – add, organize into folders, rename, change
       Change Preference
   in Netscape
    – EDIT® Preferences®;
    – Ex: EDIT® Preferences® Cache® is to set
      limits or clear Disk Cache and Memory
      Cache ;
    – Ex: set HOME.
   In IE
    – Tools -> Options
    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
   Altavista returns 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

   dsmith@umiami.miami.edu


                                  Highest-level
                                  domain

                    Next-level domain
 Username    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
            Send a Message
    To send an email, you need to know the
     mail address, ex: mlin@stfx.ca;
    Click on New message button
     Look at
       –   To: the address of the recipient
       –   CC: send copies to others
       –   BCC: send copies, mail address does not show
       –   Subject: message contents
   Type the subject and contents, click
    Send.
         Reply a Message
    Click on message header you want to reply
     to, click Reply button – Reply to sender
    Go to message section and add your text
     wherever you want
   Click on Send button
  Forward a message
Click on the message header you want to
 forward
Click on Forward button
Put in the To: the mail address you want
 to forward to, you can change subject box
You can add a message to the message
 section;
Click Send button.
Attaching files to your mail
 Begin composing a new letter
 Click on Attach button, File (You may
  also attach a web page and address card),
  browse for File name in the appropriate
  directory, Open (Path and file name will be
  displayed)
 Fill in other sections as usual and click
  Send.
Reading messages with
    attached files
Message is directly readable with the same
 systems on sending and receiving end
When receiving on some systems,
 attachments may have to be saved first
 and read later with the correct software
 application.
        Mail Folders
You can organize your messages in folders
Click on Location and show the various
 folders you have available
Some predefined folders: Trash, sent,
 personal, drafts
Create folders
Move messages to a certain folder
      Removing Messages
    Sending unwanted message to the Trash
     folder
    Click on header and then click on Delete
     button
    If more than one letter is to be deleted,
     hold down the CTRL key and then click
     succeeding headers to select them
   To Empty the trash Folder, click on
    File/Empty Trash on xmail.stx.ca
          Address book
   You can maintain your address book
              More
 TSG documentation
 Http://www.stfx.ca/people/mlin/CS100/
  Lectures/OWA.htm

								
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