Transcript Chapter 3
Chapter Three Using The Internet Authors: Dr. Ahmad Dalala Mohammad AlZou'bi Ahmad Abusalama Khaled Dijani Prepared by: Marwan Ammous and Mahmoud Al-Sakhnini 1 In This Chapter INTERNET TERMINOLOGY AND CONCEPTS USING INTERNET EXPLORER SEARCHING THE WEB CUSTOMIZING INTERNET EXPLORER SECURITY ISSUES 2 (Prepared By: Ahmed Abusalama) 1. INTERNET TERMINOLOGY AND CONCEPTS 3 (Prepared By: Ahmed Abusalama) Web Browser A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. A web browser can also be defined as an application software or program designed to enable users to access, retrieve and view documents and other resources on the Internet. 4 (Prepared By: Ahmed Abusalama) Web Browser Cont. The major web browser (in Windows O.S.) are MS Internet Explorer, Others such as: 5 1. Firefox 2. Google Chrome 3. Safari 4. Opera (Prepared By: Ahmed Abusalama) URL (Uniform Resource Locator) In computing, a Uniform Resource Locator (URL) is a Uniform Resource Identifier (URI) that specifies where a known resource is available and the mechanism for retrieving it. For example the “http://www.microsoft.com/msoffice.html” specifies the URL for Microsoft website. The ULR structure: (http://) is the Service or the Protocol that used for retrieving the requested webpage. (www.microsoft.com) is the Host which is the address of the server holding the requested webpage. (msoffice.html) is the Folder or File Structure which represents the file structure of the requested page on the server. 6 (Prepared By: Ahmed Abusalama) Other Examples of URL’s 7 (Prepared By: Ahmed Abusalama) Hyperlinks Hyperlink is an element (text, icon, image…) in a webpage that links to another place in the same webpage or to an entirely different webpage. Hyperlinks Note1: the color of hyperlink text is blue color. Note2: When you move the mouse pointer over a hyperlink it will change to the hand shape. example Clicking the hyperlink will open that link. 8 (Prepared By: Ahmed Abusalama) ISP (Internet Service Provider) An Internet service provider (ISP) is a company that provides access to the Internet. ISPs connect customers to the Internet using copper, wireless or fiber connections. 9 (Prepared By: Ahmed Abusalama) Website and Webpage A website, also written Web site, web site, or simply site, is a collection of related web pages containing images, videos or other digital assets. A website is hosted on at least one web server, accessible via a network such as the Internet or a private local area network through an Internet address (URL). A web page is a document, typically written in plain text interspersed with formatting instructions of Hypertext Markup Language or extensible Hypertext Markup Language(HTML, XHTML). A web page may incorporate elements from other websites with suitable markup anchors 10 (Prepared By: Ahmed Abusalama) 2. USING INTERNET EXPLORER 11 (Prepared By: Ahmed Abusalama) Starting The Microsoft Internet Explorer Program When the Internet Explorer opens it will open the Home Page site. A home page is the default webpage that the explorer is set to display. In the previous picture you can see that the www.google.com is the home page. To open a website, type the website URL in the Address Bar text box then press Enter key.You will see that the explorer starts loading the requested web site. 12 (Prepared By: Ahmed Abusalama) Back And Forward Buttons While you navigating the web, the explorer keep the visited web pages to easily back and forward between them. The Back button allows you to back to the last visited webpage. The forward button allows you to go to the next page you have visited. 13 (Prepared By: Ahmed Abusalama) Opening Hyperlinks Clicking a hyperlink will normally open that link in the same explorer window. To force the explorer to open a hyperlink in a new window there are two ways: Right click on the hyperlink and from the popup menu choose Open in New Window. Hold down the Shift key and click the hyperlink. To open the hyperlink in a new tab –within the same opened copy of the explorer- right click on the hyperlink and choose Open in New Tab. 14 (Prepared By: Ahmed Abusalama) Stop and Refresh Buttons To stop loading (opening) a webpage click on the Stop button.You may need to stop loading a webpage because it is too heavy or you changed your mind and want to open another one. Sometimes you may need to refresh (reload) a webpage. For example, you need to refresh a news webpage periodically to see what new. To refresh a webpage, click on the Refresh button.You can also press F5 key to refresh a webpage. 15 (Prepared By: Ahmed Abusalama) Saving Pictures As Files From Webpage To save a picture from a webpage as a file: Right click on the picture. From the popup menu choose Save Picture As. Specify the file location. 16 (Prepared By: Ahmed Abusalama) Downloading Files From A Web Page Some of the hyperlinks are created to allow you download files instead of navigating the web. File downloading is the process of copying a file from the internet to your computer, a file maybe a document, excel file, image etc. To download a file from a hyperlink: Right click on the hyperlink. From the popup menu choose Save Target As. Now you have to set where you want to save the file. 17 (Prepared By: Ahmed Abusalama) DOWNLOAD APPLICATION To download any application software , you can use the hyper link to download after navigating it on the web, you must to set where you want to save your file. for example download games , internet browsers ,etc… Download application example 18 (Prepared By: Ahmed Abusalama) 3. SEARCHING THE WEB 19 Search Engines A web search engine is designed to search for information on the World Wide Web and file transfer protocol (FTP) servers. The search results are generally presented in a list of results and are often called hits. The information may consist of web pages, images, information and other types of files. Google, Bing and Yahoo are some of the most common search engines. To search the web for specific information you can visit one of the search engine websites such as Google and Bing. In these search engine websites you will find a text box in which you have to type the keywords related to your search. 20 (Prepared By: Ahmed Abusalama) Example 21 (Prepared By: Ahmed Abusalama) Searching Using The Address Bar You can use the Address Bar for searching the web. Click within the address bar and type “Find” followed by the search query. For example “Find MS Office”. After typing the search query in the address bar you may press Enter to search using the default search engine –which is Bing in the previous example- or click one of the available search engines. 22 (Prepared By: Ahmed Abusalama) Using Keywords And Phrases To get the best results from the search engine you have to choose unique keywords that directly relate to what you searching for. Also, you should not use a single word as a search query; doing so will retrieve a large number of irrelevant results. For example it is better to search for “mini computers” than searching for “computers”. When you search for “mini computers” the search engine will retrieve any web page contains “mini”, “computers” or “mini computers”. That means a large number of irrelevant results. To go around this problem you have to use the + symbol between your keywords. In this case the search engine retrieves only the pages containing all of your keywords. To force the search engine to retrieve the web pages that contains the exact search query, you have to enclose the search query between double quotations (“ ”). 23 (Prepared By: Ahmed Abusalama) Searching By Date Or File Format Some of the search engines allow you to search the web according to the date of the file or the file type. For example: Open the Google search engine website. Click on the Advanced Search link. This will open the Google advanced search webpage. From the advanced Google search you can specify the date and file format for the retrieved results. 24 (Prepared By: Ahmed Abusalama) 4. CUSTOMIZING INTERNET EXPLORER 25 (Prepared By: Ahmed Abusalama) Setting Your Home Page To set the Home Page for the Internet explorer: Click the Tools menu from the menu bar and click Internet Options. This will open the Internet Options dialog box. Now type the required home page URL and click Ok. You can use a blank page as a home page by clicking Use blank button. You can use the current opened page as a home page by clicking Use current button. You can use the default home page as a home page by clicking Use default button. The default home page is a link for the MS website. You can set multiple home pages by typing their URLs separated by new line. Current webpage, use blank 26 (Prepared By: Ahmed Abusalama) Setting your home page (cont…) 27 (Prepared By: Ahmed Abusalama) Visiting The Home Page To open the home page at any time while you navigating the web click the Home icon existed in the command bar.You can also press Alt + M to open the home page. 28 (Prepared By: Ahmed Abusalama) History Folder Internet Explorer keeps a log of the visited 29 pages in the history folder. To view the history folder content click on the view history icon.You can delete a history item by right clicking on it and choosing Delete. To delete the entire history: Open the Internet Options dialog box. Click the Delete button existed in the Browsing History group. The Delete Browsing History dialog box displayed. Check the History check box and click the Delete button. (Prepared By: Ahmed Abusalama) Revisiting Web Pages Via The Address Bar When you click the down arrow to the right of the address bar a list of the recently visited websites appeared. Click on any website to revisit it. 30 (Prepared By: Ahmed Abusalama) Internet Cache Internet cache also known as "Temporary Internet Files" is used to help improve browsing speed. In most cases, each time a web page is opened, a copy of its content (text and images) is sent to your browser's temporary cache on your hard disk drive. If that page is accessed again and has not been modified, the browser will open the page from your cache instead of downloading the page again. To delete the cache files: Open the Internet Options dialog box. Click the Delete button existed in the Browsing History group. The Delete Browsing History dialog box displayed. Check the Temporary Internet Files check box and click the Delete button 31 (Prepared By: Ahmed Abusalama) Adding A Web Page To Your Favorites Internet Explorer allows you to save links to 32 web pages as Favorites or Bookmarks, making it easy to revisit these pages at a later time. These pages can be stored in sub-folders, letting you organize your saved favorites just the way you want them. To add a webpage to the favorite list: Open the required webpage. From the Favorite menu click Add to Favorite. The Add to Favorite dialog box displayed. Set the favorite name and click Add button. To open the favorite list, click on the Favorite icon (Prepared By: Ahmed Abusalama) 5. SECURITY ISSUES 33 (Prepared By: Ahmed Abusalama) Submitting Web Based Forms In many cases you need to fill a web forms especially when you want to register with some websites. A web form looks like this: 34 (Prepared By: Ahmed Abusalama) Secure Web Sites And Https A secure web site uses encryption and authentication standards to protect the confidentiality of web transactions. When you enter a secured websites you will see a padlock icon to the right of the address bar. If you don’t see the padlock icon don’t enter any valuable information to that site. Not Secure Secure 35 (Prepared By: Ahmed Abusalama) POP-UP WINDOWS Pop-up ads or pop-ups are a form of online advertising on the World Wide Web intended to attract web traffic or capture email addresses. Pop-ups are generally new web browser windows to display advertisements. The pop-up window containing an advertisement is usually generated by JavaScript, but can be generated by other means as well. Pop-Ups are annoying mini windows or messages appeared automatically when you visited certain websites. Pop-Ups used especially for marketing. 36 (Prepared By: Ahmed Abusalama) Example of pop-up window Pop-up window 37 Pop-up window (Prepared By: Ahmed Abusalama) Pop-Up Blocking To block the pup-up windows, from the Tools menu select internet options,then select privacy tab, , now from the Pop-up Blocker tool, you can turn the blocker on or off. 38 (Prepared By: Ahmed Abusalama) Cookies Cookie is a message given to a Web browser by a Web server. The browser stores the message in a text file. The message is then sent back to the server each time the browser requests a page from the server. The main purpose of cookies is to identify users and possibly prepare customized Web pages for them. You can enable or disable cookies in Internet Explorer from the Privacy tab in the Internet Options dialog box. 39 (Prepared By: Ahmed Abusalama)