Wwwhat Understanding Net Addresses

1
Lesson 3

• Wwwhat? Understanding Net Addresses

2
Hyper About Hyperlinks

• Hyperlinks allow you to point your mouse at words
  or pictures, click once, and jump to another page
  instantly
• The mouse pointer turns to a hand when passing
  over links

3
How Hyperlinks Work

• URLs are like street addresses for the Web
• A street address has as many as six parts
• (1) A name
• (2) A street address
• (3) A city
• (4) A state
• (5) A ZIP code
• (6) A national code (from overseas)

(1)John Doe (2)1234 Anywhere Street (3)Santa
Clause, (4)CA (5)09876 (6)USA
4
How Hyperlinks Work

• A URL (Uniform Resource Locator) serve the same
  purpose as a street address to help locate
  resources on the Web
• A URL has three parts
• (1) The Web server with a Web page is located
• (2) The folder(s) the Web page is in
• (3) The actual name of the file

(1)www.somewhere.edu(2)/thisis/thepath/toa/(3)file
.html
5
Creating Hypertext Links

• Hidden HTML tags make hyperlinks or links work
• They are written similar to this
• lta hrefhttp//www.disney.comgtClick to link to
  Disneys Web Sitelt/agt
• This link appears on the screen as this
• Click to link to Disneys Web site

6
Domain Names and IP Numbers

• URLs contain domain names such as apple.com,
  microsoft.com and abc.com
• Computers have an Internet Protocol (IP) numbers
  such as 208.232.91.5 that identify it on the
  Internet.
• A Domain Name Server (DNS) matches an IP number
  with its domain name

7
Top-level Domain Names

• Top-level domain names (TLDs) tell you what kind
  of identity owns a particular domain name
• The first top-level domain names to appear on the
  net were
• .com Commercial institutions or businesses
• .edu Educational institutions
• .gov Government sites
• .mil Military sites
• .net Network gateways
• .org Organizations
• .int International organizations