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Web Basics for Critical Thinking

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by

Greg Hundermark

on 12 December 2012

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Transcript of Web Basics for Critical Thinking

Web Basics for Critical Thinking The Internet is a network of many different computers, all over the world, connected together.
The network allows computers to talk to each other even though…

they may be separated by large distances.
are made by different manufacturers.
run on different operating systems. What is the Internet? What are IP Addresses? The Internet works by allowing Web browsers (software for retrieving web pages) to call up addresses, much like ordinary mail.

These addresses are called Internet protocol (IP) addresses. EX: 212.58.240.33
IP addresses mean nothing to most people, so domain names (text with slashes and dots) are used instead. EX: http://www.google.com
This makes remembering and navigating to Web sites much easier! In the Google web address, google.com is the domain name.

A domain name can have two to four components.

the name (assigned to only one person/group). (EX: google.com)
top level domain (TLD) (designated for certain groups or categories). (EX: pequeavalley.org)
country code (EX: www.amazon.co.uk)
sub domain (EX. support.microsoft.com What else should I know about domain names? Why do people buy domains? To represent the Web site to the outside world. Two main reasons

To describe who they are. (EX. adidas.com)
To manipulate and hide the true purpose of their site. (EX. MartinLutherKing.org) What’s in a domain name? ICANN, a nonprofit organization currently manages and assigns Internet addresses.

The rights to a domain name are purchased from registration companies.

networksolutions.com is a company that has the commercial rights to sell web addresses.

They also allow you to gather information about who currently owns a domain name, this is called a WHOIS search. Your Task: Use the WHOIS feature on networksolutions.com to find out who is behind MartinLutherKing.org What is the World Wide Web? Most URLS begin with www., which stands for World Wide Web.

The World Wide Web is a collection of billions of Web pages stored on computers called servers.

These pages contain text, graphics, video, and sound.

When you type a URL into your Web browser and hit enter… the browser sends a request to the server
that stores the page. the server then sends the page to your
browser and it appears on your computer screen. What other terms should I know? URL Home Pages URL is another term for Web address.
URL stands for Uniform Resource Locator. After typing a domain name into your browser, the first place you usually arrive is the site’s home page.

Acts like an index or front cover of a book or magazine. Links Enable you to easily surf the Web and navigate through related sources of information with split-second connections.

Are usually underlined, highlighted, or represented by a graphic.

In most browsers, when moving a cursor over a link, the cursor arrow turns into a hand and the URL appears in the corner of your browser. URL is another term for Web address.

URL stands for Uniform Resource Locator. How do I read a URL? URLs can provide you with a snapshot of how Web pages with that site are organized.

URLs describe

specific folders, servers, companies, countries, and communication methods.
Confused? It’s not really. Here are some examples… http://www.moma.org/

This is the home page for the Museum of Modern Art.

The extension .org refers to an organization.

Be aware, anyone with a credit card can purchase a Web address with a .org extension. http://www.moma.org/education

This URL leads to a web page that includes the same domain name, but is deeper in the site.

Each slash (/) represents another level deeper (like a folder!) http://www.sandiegozoo.org/teachers/classroom_activities.html

Long URLs will have many forward slashes.

Each forward slash represents one level deeper on the site.

In this example, classroom_activities.html is a file in the teachers folder.

teachers is a folder within the site sandiegozoo.org EXAMPLE #03 EXAMPLE #01 EXAMPLE #02 What's an easy way to
remember the difference
between a
forward / backslash? / forward slash

\ backslash K
N
O
W

T
H
I
S Web addresses are read left to right.

Unlike in books, there are no page numbers.

The way you find a specific page on a site is to
have the correct address that points to the one
page you are looking for.

There are no spaces in URLs.

Slashes are always forward ( / ). KNOW THIS Truncating
URLs Since URLs are structured like folders, you can check out the page or level above the one from which you started.

This is good for validating information.

Truncating is done by clicking at the end of a Web address and deleting all characters up to the previous left slash.

Each time you delete to the previous slash, you move up a level in the organization of the site.

You can continue to truncate until you end up with just the domain name – which is generally the home page of a site. TRUNCATING URLs PRACTICE
TRUNCATING Truncate this URL. Start with the top address and remove one level at a time:

http://edudemic.com/2012/10/the-20-best-learning-management-systems/

Be able to tell me about each of the different levels of the site. PRACTICE TRUNCATING PRACTICE VALIDATING Truncate the following URL to determine the validity/authenticity of the information.

http://www.bigredhair.com/robots/index.html

Do you believe that a Victorian robot spent time with Pancho Villa and fought in World War I? November, Alan C. Web Literacy for Educators. Thousand Oaks, CA: Corwin, 2008. Print.

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