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IT 285 - Web Design

QuestionAnswer
Intranet Local area network: connects computers in the local area Normally owned by and operated within an organization Only be used by a user who has the intranet access account The term is used in contrast to internet
The Internet A network of connected computers Interconnected networks It is all about sharing information (e.g., data, documents) Origins: ARPANET, 1962
The architecture of the Internet LAN: local area network, which is usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively. WAN: wide area network which covers a broad area
Internet Exchange Point (IXP) keep local Internet traffic within local infrastructure and to the reduce costs associated with traffic exchange between Internet Service Providers (ISPs).
World Wide Web (WWW) An application that runs on the Internet A document sharing application The Web is a system of interlinked hypertext documents accessed via the Internet The Web uses a protocol called HTTP (HypeText Transfer Protocol) to transfer documents
Why World Wide Web (WWW) To address difficulty in sharing formatted documents difficulty in linking various documents with each other Tim Berners-Lee, 1989, CERN Labs, Switzerland Powered by HTML (Hypertext Markup Language) Web documents are written predominantly in HTML
What is Web Application? runs on the Web multiple computing components work together to bring a piece of information over the internet and display it on user’s computer.
Client-Server Model Computers are assigned to one of the two roles, either as a client or a server.
Server: provide selected information according to client request.
Client: allow users to send request to access the services provided by different servers.
Components of Web Applications Client Internet Server Users
Uniform Resource Locator (URL) specific character string that constitutes a reference (i.e., address) to an Internet resource.
Scheme name ftp, telnet
Domain name host or server name
Default Web Page index.html or home.html
Dynamic web page generated according to user’s inputs. normally requires more computing resources besides web server. users has control at certain level on what should be displayed
Static web page Predefined and stored on web server. Written in HTML only. Users have no control of the content and format. The web page returned by web server.
JavaScript a client-side scripting language runs on client (web browser) used to create dynamic features. response to users’ input at certain level. web server returns HTML and JavaScript to client
HTML (HyperText Markup Language) a computer language that is used to create documents displayed on the World Wide Web.
Principal Components of a Web Page 1.Text 2.References 3.Markup
Formal Structure of HTML(5) document Doc type declaration <!DOCTYPE html> <html> <head> …… </head> <body> …… </body> </html>
Title <head> <title> …… </title> …… </head>
Adding Comments <!--, the ending tag is -->
Superscripts and Subscripts To create a superscript use <sup> subscript use <sub> tag
Quoting Text <q> or <blockquote>
character entities All character entities start with an ampersand (&) and end with a semicolon (;)
Definition(Description) Lists Definition lists allow you to indent without necessarily having to use bullets. Use <dl>, <dt>, and <dd> tags.
Hyperlinks <a href=“ UW Whitewater </a>
Inserting Images <img src=“images/murachlogo.gif" alt=“Murach Logo”>
Block elements Main building blocks of the content of a web page. Each block element begins on a new line. identify the type of content that they contain.
Inline elements elements in contrast to block elements. Coded within a block element, doesn’t start on a new line. formatting elements. can NOT contain block elements.
linking to a placeholder within the same page <a href="#ex”>My Experience</a>
Creating placeholder <a id=“ex”>
Format GIF, JPEG, PNG
Transparency GIF and PNG formats allow portions of image to be transparent, but not JPEG
Created by: 1085333441