Overview of the Internet

Internet
-Is a worldwide collection of network

Evolution of the internet

ARPANET

• ARPA-Advance Research Project Agency created by US Department of Defense 
• The network is call ARPANET
• The network became functional in September 1969

Who control the internet?
-No one-it is a public,cooperative and independent network
-Several organisation set standard

• Example of organisation:

World Wide Web Consortium that involved with issues such as:

1. Establishing the protocols
2. Making recommendations for changes 
3. Coordinating communication among the network 

Advantage and Disadvantage of internet

Advantages	Disadvantages
Easy to download software freely	Virus threat
Can make online transaction such as online banking,ticket booking and fliht ticket reservation	Sosial disconnect
People can send messages via email	Dangers to the children when using internet such as vulnerable pornographic sites
Can find information by using internet search engine	Information can be accesed by irresponsible person

Advantage and Disadvantage of intranet

ADVANTAGE	DISADVANTAGE
Commersial and confidential data is kept secure within the organization	High financial cost incurred by the company when initially implementing the intrane
Email remail private and may also may be encrypted	Connections between intranet potentially compromises security,by allowing virus infections or system hacking
High bandwith.No connection limits unlike the internet	Staff needs training to ensure workers know how to use the system effectively
Reliable.The company will have dedicated IT personnel to keep things running smoothly	Information overload because it reduces productivity

Advantage and Disadvantage of Extranet

ADVANTAGE	DISADVANTAGE
Enchanged large volumes of fata using electronic data interchange(EDI)	Extranet can be expesive to implement and maintain within an organization
Share products catalogs exclusively with trade partners	Security of extranet can be a concern when hosting valuable or propritary information