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Surfing the Web Prepared by Gena Casas URLs Domain Name System (DNS)provides a mnemonic equivalent of a numeric IP address and ensures that every site on the Internet has an unique address. Ensures each Web page has its own URL - (uniform resource locator). Domains

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Surfing the Web

Prepared by Gena Casas


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URLs

  • Domain Name System (DNS)provides a mnemonic equivalent of a numeric IP address and ensures that every site on the Internet has an unique address.

  • Ensures each Web page has its own URL - (uniform resource locator).


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Domains

  • DNS divides the Internet into a series of component networks called domains.

  • Large domains

    • Divided into smaller domains

    • Each domain responsible for maintaining unique addresses in the next lower-level domain, or subdomain.

  • Each host on the Internet is assigned a domain name based on its usage.


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URL Format

  • protocol://machine address/path/filename

    • http://www.udel.edu/interlit/chp1.html

  • The protocol determines how the communication is handled.

  • The machine address contains the following:

    • hostname.subdomain.top-level-domain

  • The path points to a specific site within the server.

  • The filename is the name of the document.


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Home Pages

  • Three different meanings on the Web:

    • Main page for a particular site

    • First page that opens when you start your browser

    • Page that is loaded first time browser is used

  • Default home page can be changed

  • Help organize and access information at site


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Hypertext Links

  • Words that trigger events linked to text

  • Underlined and printed in different color

  • Can change default color of hot words

    • Modify browser’s preferences

    • Colors must not be set by page author


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Hyperpicture Links

  • Pictorial hot spots that trigger events linked to image.

  • Images can be:

    • little icons

    • larger graphics

    • multiple hot spots in one image


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Web Navigation Tools

  • Navigation Buttons - Located at top of browser

    • Back

    • Forward

    • Home

    • Stop

  • History List

    • Three ways to access list

    • Show slightly different information

  • Bookmark

    • A pointer to a Web page


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History List

  • Click down arrow just to right of Netsite/Location box.

    • List shows most recent few pages.

    • Includes only URLs typed or entered with Open Page command on File menu.

    • Does not include sites visited by clicking a link.


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History List

  • Click Go on the menu bar.

    • Displays all sites visited during this session.

    • Includes both sites visited by linking and by entering URL in Location box.

    • Does not include sites visited in previous sessions.


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History List

  • Select History from Communicator menu

  • Press Ctrl-H

    • Displays entry on separate line.

    • Contains page title, URL, and other information.

    • Includes history from previous sessions.


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Configure History

  • To set History Parameters

    • Select Preferences from the Edit menu.

    • Click Navigator category.

    • In History section enter number of days to accumulate

    • To clear History, click the Clear History button.


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Bookmarks

  • To ADD a Bookmark

    • Click the Bookmark icon of the Toolbar bar

    • Click Communicator and click Bookmarks, then click Add Bookmark.

    • If you have a lot of bookmarks, you should organize them in folders.


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Bookmarks

  • To CHANGE the name of a bookmark

    • Select and right-click the bookmark

    • Click on Bookmark Properties

    • In the name box enter the new name


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Bookmarks

  • To CREATE a folder

    • Select and right-click the existing folder under which the new folder should be created.

    • Choose New Folder from the context menu

    • Enter the name of your new folder and click OK

  • To ADD a bookmark to a particular folder

    • Click File Bookmark on the menu and select the desired folder.


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Bookmarks

  • To SAVE a bookmark file to a floppy disk

    • Click Edit Bookmark

    • Click File on the menu bar

    • Click Save As

    • Click Save In list box and type A:\

    • Click the Save button to save the bookmark file and close the dialog box


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Bookmarks

  • To CREATE a new bookmark file

    • Click Communicator

    • Click Bookmarks

    • Click Edit Bookmark

    • Click File on the menu bar

    • Click New, Blank Page - This opens the Composer window

    • Click Save As and give the empty page a name….be sure that file type is HTML and the correct disk/drive is selected.

    • Close the Composer window

  • Before creating or opening a new bookmark file, be sure you know where your current bookmark mark file is located.


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