IT in Education: Foundation

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Introduction

• IT in Education Foundation
• Lee Fong-Lok, fllee_at_cuhk.edu.hk

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IT Education in Hong Kong
http//www.info.gov.hk/emb/public/it_table.html
3
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? ? ? ? Intermediate Level

• ???????,????????????,
• ????????????????
• ????30????

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• Word Processing II
• Presentation Software II
• Multimedia Production I
• Web Page Design I
• Internet/Intranet Applications
• Courseware Evaluation
• Chinese Character Input (Optional)
• Database I (Optional)
• Spreadsheet Operation I (Optional) ???

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More Information on IT Competency

• CUHK http//www.sitc.cuhk.edu.hk/
• Hong Kong http//www.hkedcity.net/resources/

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What you are expected

• Achieved CU IT Competency ( Basic)
• Study Level 2 ( Intermediate)
• Study Level 3 ( Upper Intermediate) before
  graduation

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Internet/Intranet Applications

• Internet, Extranet, Intranet and WWW
• Discussion Group, Newsgroup and ICQ
• Educational Values of WWW
• File Transfer Protocol (FTP)

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WWW and Internet TechnologyBasic Concepts in
Computer Networks
Personal Computer (PC)
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WWW and Internet TechnologyBasic Concepts in
Computer Networks
Computer Network A group of two or more computers
linked together.
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WWW and Internet TechnologyBasic Concepts in
Computer Networks
Local Area Network (LAN) A computer network where
the computers are geographically close together
(that is, in the same building).
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Sharing Files in the LAN

• Share folders with others
• Upload to or download from a computer in the same
  LAN.
• Shared Drive

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WWW and Internet TechnologyBasic Concepts in
Computer Networks
Sino Building 614
M1, Ho Tim Building
Web Server
mailserv
ftp server
Wide Area Network (WAN) A computer network that
spans a relatively large geographical area.
Typically, a WAN consists of two or more LAN.
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WWW and Internet TechnologyBasic Concepts in
Computer Networks
CUHK
Internet

• Internet
• A global network connecting millions of
  computers.
• INTERnational NETwork

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World Wide Web

• WWW or the Web.
• It consists of a network of computers which
  provide Web pages to Internet users.
• Web pages consist of hypertext which includes
  text (and pictures) to provide information along
  with links to other Web pages.
• Users access these pages using a browser which
  uses the addresses of the links to connect to and
  download the pages.

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Examples of Browsers

• Internet Explorer http//support.microsoft.com/ph/
  2073
• Netscape http//home.netscape.com/
• Avant Brower http//www.avantbrowser.com/
• Opera http//www.opera.com/
• Firefox http//moztw.org/firefox/

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WWW and Internet Technology Internet Access
www.yahoo.com
You
Internet
Access from a LAN You can access the Internet if
you are connected to a LAN, which is connected to
the Internet.
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WWW and Internet TechnologyInternet Services -
Web

• A Web page may contain text, images (.gif, .jpg
  format), audio, video objects as well as
  hyperlinks
• A hyperlink links to another Internet object,
  which is specified by a URL (Unique Resource
  Locator)
• There are two types of hyperlink
• Text based hyperlink
• Image based hyperlink
• A URL is the address of a particular Internet
  object

http//www.cuhk.edu.hk/fed/tutorial.html
Directory name
Protocol
Server name
File name
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The HTTP Protocols

• The Hypertext Transfer Protocol (HTTP) is the set
  of rules for exchanging files (text, graphic
  images, sound, video, and other multimedia files)
  on the World Wide Web
• It is the default protocol used in the web
  browsers

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WWW and Internet TechnologyInternet Services
Web publishing

• Use HTTP (HyperText Transfer Protocol)
• Supported by the Web Server
• Client needs a Web-browser to access the web pages

Web page
Web Server
Web Client (via browser)
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Internet/Intranet ApplicationsFTP (File Transfer
Protocol)

• FTP (File Transfer Protocol) an Internet
  Protocol used to exchange files between computers
  in the Internet
• You can use FTP with a simple command line
  interface, a browser or FTP tools such as WS_FTP
• E.g. try accessing ftp//ftp.cuhk.edu.hk using a
  browser
• Using FTP, you can update (delete, rename, move
  and copy) files which are at the server side
• Nowadays, the word FTP is often abused. Many of
  the so-called FTP sites uses HTTP to transfer
  files
• HTTP mainly for displaying web pages
• FTP for file transfer and file operations

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Using FTP to upload
Web page
download
upload
Web Server
Other users
To publish a webpage, you need to upload the
corresponding files to the web server.
Your PC
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Upload the web pages usingWS_FTP (an FTP
software)

• Start WS_FTP
• Click on the WSFTP logo
• Or ?? - ??? - Internet Tools - WS_FTP
• Create a new FTP profile

Click to create a new profile
The name of the server
Your account ID
Your password
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Using FTP
iHome ftp//iHome.cuhk.edu.hk Login
sxxxxxx Password xxxxxx
Learning Community ftp/course.fed.cuhk.edu.hk Lo
gin and Password to be assigned by the system.
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Upload the web pages usingWS_FTP (an FTP
software)

• Transfer your local files to the server
• The files are uploaded to the server using the
  File Transfer Protocol (FTP)

Files in your local hard disk
Files on the server under your own directory
Click on the arrow to upload the files
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Internet/Intranet ApplicationsIntranet

• An internal parts of a companys web pages
• Private, can only access within the organization
• Contains information and services which can only
  access by the staff and employees/students within
  an organization
• Security is important
• Use firewalls to restrict access from outside
  network
• Sometimes need login

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Internet/Intranet ApplicationsIntranet

• Example
• http//www.lib.cuhk.edu.hk/electronic/jol.htm
• Only students/staffs from CUHK can access to the
  above link (CU intranet)
• Only computers that are directly connected to the
  CU network can access to the server hosting these
  information information
• Example
• https//extranet.hku.hk/apptunit/
• You cannot access the For HKU Staff Only session

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Internet/Intranet ApplicationsIntranet
Intranet Web Server
Internet Web Server
Firewall (block external traffic)
Internet
Organization LAN/WAN

• Only computers which are behind the firewall
  can access to the Intranet Web Server

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Extranet

• An extension of a company's Intranet out onto the
  Internet.
• Allows the sharing of a company's data and/or
  operations with partners, customers, suppliers,
  and vendors.

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Internet/Intranet ApplicationsNewsgroups and
Discussion Forums

• Purpose a place for exchanging information
  within a group of people
• Web based vs. non-web based
• Discussion groups Web based http//www2.fed.cuhk.
  edu.hk/ited/AppOfComp/Forum.htm
• Newsgroups Non-web based news//news.cuhk.edu.hk/
  cuhk.forum
• For newsgroups (non-web based), newsgroup client
  software is needed. You also need to subscribe to
  the newsgroup first
• (compare with hotmail and mailserv)

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ICQ (I seek you)

• ICQ ("I seek you"),
• the popular instant-messaging program that lets
  you communicate with friends and colleagues in
  real time.
• To seek out a friend on the ICQ network, simply
  enter his or her ICQ number, name, nickname, or
  email address.
• Once your contact list is set up, you'll be
  notified when your friends are online so that you
  can chat send instant messages, files, and URLs
  play games or just hang out.
• Download the system at http//www.icq.com/download
  / and follow the instructions to install and
  register.
• See if you can find my ICQ number and ICQ me.

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MSN Messenger

• http//messenger.msn.com/xp/downloadDefault.aspx

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Education Values of WWWTeaching and Learning
Resources in WWW

• Useful Links
• http//www.fed.cuhk.edu.hk/fllee/CommonUse/Links.h
  tm
• ??????
• http//www.hkcampus.net/main.phtml
• ???????
• http//www.hkedcity.net

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Internet Filtering

• There are very little control (or no control at
  all) over the contents that post in the Internet
• Not all are suitable for students/children
• Requires Internet filtering software to block
  unwanted sites

http//www.we-blocker.com/
http//www.surfcontrol.com
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Education Values of WWWWeb-based Learning
Virtual Classrooms

• Some examples
• https//www.sitc.cuhk.edu.hk/itcourseware2/index.j
  sp (need login)
• WebCT
• A complete Web-based learning environment shall
  include the following elements / functionalities
• Course materials
• Assignment submission
• Evaluation and assessment
• Teacher-student communication
• Etc etc

Not only course materials!!
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References

• http//www.edrenplanners.com/present/intranet/intr
  a_def.shtml
• http//www2.vip.net/seniors/definit.htm
• http//www.info.gov.hk/emb/public/it_table.html
• CUHK http//www.sitc.cuhk.edu.hk/
• http//courseweb.bus.lsu.edu/summer98/marketing/44
  14-1/group4/project1/def.htm
• http//www.arsh.com/art-glass/discuss.htm
• http//coverage.cnet.com/Content/Features/Howto/Be
  yond/ss02.html
• http//www.icq.com/