Addresses, URLs and Links -- Setting Up A Course Website

Addresses, URLs, and Links

Addresses: Universal Resource Locators (URLs)

Structure of a URL

Examples

URL References

Addresses: Universal Resource Locators (URLS)	Universal Resource Locators (URLs) are unique addresses of materials available via the internet. URLs are analogous to street addresses. URLs can be used by the browsers of client computers to obtain materials from server computers.
Structure of a URL	Below is an example of this page's URL: `http://www.plu.edu/libr/workshops/web_course/addresses.html` The first part of the URL ("http" in the example above) defines the type of resource that is being addressed. Examples include: http - Hypertext Transfer Protocol telnet , rlogin - Reference to interactive communication sessions ftp - File Transfer protocol gopher - The Gopher protocol mailto - Electronic mail address news - Usenet news wais - Wide Area Information Servers images - pictures, maps, graphics sounds - sound clips movies - QuickTime movies The next part of the URL includes the domain name of the computer, any port specifications, and the path of the resource on the computer. In the above example of this page's URL the components are: Domain name = `www.plu.edu` Path = `libr/workshops/web_course/addresses.html` In this case the document file "addresses.html" is stored three layers deep in the directory structure.
Examples	Below are examples of URLs. Click on the one you want to go to. Alternatively, use the "Go To" box to enter the URL. gopher Library of Congress (MARVEL) URL: `gopher://marvel.loc.gov` http News Tribune WWW Home Page URL: `http://www.tribnet.com` telnet PLU Library QUEST Catalog URL: `telnet://library.plu.edu`
URL References	Specificat ion of URL's

Maintained by: Layne Nordgren (nordgrle@plu.edu)
Last Update: 05/26/99

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