Module 4
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The document provides information about common internet terms and concepts: - The internet is a global network of computers that allows browsing of websites through internet browsers like Internet Explorer or Netscape. - Websites contain one or more web pages that users can navigate between by clicking links. Each website has a unique web address made up of components like http:// and a domain name that identifies its location. - Common endings to web addresses indicate if a site is commercial (.com), educational (.edu), a government site (.gov) or located in a specific country domain like .ca for Canada.
Module 4
- 2. SomeCommonTerms • The Internet is a network of computers spanning the globe. It is also called the World Wide Web. • An Internet Browser is a software program that enables you to view Web pages on your computer. Browsers connect computers to the Internet, and allow people to “surf the Web.” • Internet Explorer is one of the browsers most commonly used. There are other browsers available as well, including Netscape.
- 3. • A site or area on the World Wide Web that is accessed by its own Internet address is called a Web site. • A Web Page is like a page in a book. Websites often have several pages that you can access by clicking on links. A Web site can be a collection of related Web pages. • Each Web site contains a home page (this is the original starting page) and may also contain additional pages. • Different computers will have different home pages. You can set your own webpage.
- 4. PartsofaWebAddress • A web address is typically composed of four parts: • For example, the address http://www.google.ca is made up of the following areas: • http:// This Web server uses Hypertext Transfer Protocol (HTTP). This is the most common protocol on the Internet. • www This site is on the World Wide Web. • google The Web server and site maintainer. • ca This tells us it is a site in Canada.
- 5. • Endings of web pages tells us a bit about the page. Some common endings to web addresses are: • com (commercial) • edu (educational institution) • gov (government) • net (network) • org (organization) • You might also see addresses that add a country code as the last part of the address such as: • ca (Canada) • uk (United Kingdom) • fr (France) • us (United States of America) • au (Australia)
- 6. WorkingwithInternet 1. Go to the address bar. Click once to highlight the address. (It should turn blue). 2. Hit the Delete key on your keyboard. 3. Enter the following address: www.theweathernetwork.com 4. Then press Enter on the keyboard or click on the word Go on the right side of the Address Bar.
- 7. SearchtheInternet • If you don’t know the address of the webpage, but want to learn more about a topic or find a particular website, you will need to do a search. • There are several handy search engines out there that will locate information for you. Two of the mostly commonly used are: www.google.com www.yahoo.com
- 8. What is an IP address? • IP (Internet Protocol) address • device used by routers, to select best path from source to destination, across networks and internetworks • network layer address, consisting of NETWORK portion, and HOST portion • logical address, assigned in software by network administrator • part of a hierarchical ‘numbering scheme’ - unique, for reliable routing • may be assigned to a host pc, or router port A way to identify machines on a network A unique identifier
- 9. IP usage Used to connect to another computer Allows transfers of files and e-mail
- 10. IP structure IP addresses consist of four sections Each section is 8 bits long Each section can range from 0 to 255 Written, for example, 128.35.0.72
- 11. IP structure These four sections represent the machine itself and the network it is on The network portion is assigned. The host section is determined by the network administrator
- 12. IP structure 5 Classes of IP address A B C D and E Class A reserved for governments Class B reserved for medium companies Class C reserved for small companies
- 13. IP structure Class D are reserved for multicasting Class E are reserved for future use
- 14. IP Addresses IP addresses are: Unique Global and Standardised Essential
- 23. Pros
- 24. Cons