INTRODUCTION TO THE INTERNET

1. DEFINITION

1.1. Internet is a worldwide collection of network that links millions of businesses,goverment agencies,educational institutions and individuals.

2. INTERNET

2.1. Public Network

2.2. Worldwide Collection of Network

2.3. May access all kind of information

2.4. Provide information to public

2.5. Security:loose

3. INTRANET

3.1. Private network wiithin an organization that resembles the internet

3.2. Internal network thet uses Internet technologies

3.3. Information accessible to employees and faciliotate collabration within an organization

3.4. example:Telephone directories,Internal job opening

3.5. Provide information for organization employees

3.6. Security:high

4. EXTRANET

4.1. Private network that connect more than one organization

4.2. Purpose:To increase efficiency and reduce cost

4.3. Allow customer and suppliers to access part of intranet

4.4. Example:Access data,check status,place orders,send mail

4.5. Provide information to suppliers,customers and business partner

4.6. Security:Use virtual private network(VPN) technology to communication over the internet more secure