Embed Size (px)
Citation preview
Chapter3 Chapter3 全球資訊網概全球資訊網概論論
Instructor: Cheng-Ta Lee 李政達
E-mail: [email protected]
The slides are saved in http://ec.it.fit.edu.tw/ecdata/echandout/ec
March 4, 2010 全球資訊網概論 第 2頁 / 共 12 頁
全球資訊網概論內容 History WWW Uses Hypertext The Web Architecture Intranet Architecture Intranet 的好處 Intranet 的劣勢 Integrated Browsers Other Services
March 4, 2010 全球資訊網概論 第 3頁 / 共 12 頁
History
In 1989, Tim Berners-Lee at CERN began the Web project. The goal of the project was two-fold: (a) to develop ways of linking distant documents (hyperlink); and (b) to find ways of enabling users to work together (collaborative authoring).
March 4, 2010 全球資訊網概論 第 4頁 / 共 12 頁
History
National Center for Supercomputing Applications (NCSA) programmers developed Mosaic in 1993, the first brower with a graphical user interface.
March 4, 2010 全球資訊網概論 第 5頁 / 共 12 頁
History
Netscape develop Netscape Navigator in December 1994. This was the first commercially available brower for the Web to include built-in security capabilities, which facilitate commercial transaction over the Internet.
March 4, 2010 全球資訊網概論 第 6頁 / 共 12 頁
WWW Uses Hypertext Pages contain links to other pages
Webserver A Webserver B
Webpage
March 4, 2010 全球資訊網概論 第 7頁 / 共 12 頁
The Web Architecture
Web Clients Web servers
TCP/IP-based network
Databases
Content
Softwareapplication
CGI ASPP
HP
March 4, 2010 全球資訊網概論 第 8頁 / 共 12 頁
Intranet Architecture
InternetFirewall
Computer
InternetFirewall
Computer
InternetInternetClientStation Server
Legitimate Webserver
Hacker
March 4, 2010 全球資訊網概論 第 9頁 / 共 12 頁
Intranet 的好處
公佈資訊容易 成本低 容易使用 維護容易
March 4, 2010 全球資訊網概論 第 10頁 / 共 12 頁
Intranet 的劣勢
比群組軟體不夠 Powerful no built-in data replication or directory services for remote users (Lotus Notes)
Firewall 內部風險 缺乏整合
e-mail and web servers (Lotus Notes)
March 4, 2010 全球資訊網概論 第 11頁 / 共 12 頁
Integrated Browsers
HTTP FTP Gopher NNTP HTML JPEG
Built-in protocol support other browser functionality
March 4, 2010 全球資訊網概論 第 12頁 / 共 12 頁
Other Services
Virtual Reality Modeling Language (VRML)
RealAudio Directories Search Engines Other Plug-In
– e.g. Flash Player
