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1.5 - Web Technologies

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Overview
Flight Path
Learning Objectives
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 1.5 I can explain the purpose and characteristics of the internet (e.g. public, open access)
 1.5 I can explain the purpose and characteristics of an intranet (e.g. private, closed access)
 1.5 I can explain the characteristics of an extranet (e.g. private, part shared access)

🏁 Learning Objective 22 :- I can explain the purpose and characteristics of the internet (e.g. public, open access)

Types of WWW technologies

Although they are closely linked , the internet and the world wide web (WWW) are not the same thing. The internet is a global network of connected computers. The www is formed by the web pagess on the internet and the internet is then used to access those pages. In order to ensure that the information was accessible to all users three technologies were developed. HTTP, FTP and URL


Question

  1. Explain each of the following technologies ?
    • HTTP
    • FTP
    • URL
Write the answer in your revision powerpoint!

Extension question:

  1. What technology has since been developed to make internet communications more secure?

🏁 Learning Objective 23 :- I can explain the purpose and characteristics of an intranet (e.g. private, closed access)

Intranet

An intranet is a private network, operated by a large company or other organisation, which uses internet technologies, but is insulated from the global internet.

What do they do

Intranets typically start by publishing web pages about company events, health and safety policies, and staff newsletters. Popular applications follow, such as forms to reclaim expenses or request holidays. All these help eliminate paperwork and speed up workflows.

As more features are added, an intranet can become essential to the operation of an organisation. It becomes a portal that provides access to all the things workers need.

The intranet is protected from the global internet by firewalls and by the need to log on with a secure password. Staff working outside the organisation may be able to access the intranet by using a VPN (virtual private network). This means all communications between the intranet and the user’s personal computer are encrypted.


Question

  1. Explain the main difference between an intranet and the internet?
Write the answer in your revision powerpoint!

Extension question:

  1. What kind of netwotk is an Intranet and how does it connect to the Internet?

🏁 Learning Objective 24 :- I can explain the characteristics of an extranet (e.g. private, part shared access)

Extranet

An extranet is an intranet that is accessible to some people from outside the company, or possibly shared by more than one organisation.

What do they do

Extranets take this process a step further, by providing access to people who work for different organisations. For example, a company could provide access to a supplier for online ordering, order tracking and inventory management. Instead of sending information to suppliers, it lets them fetch it on a self-service basis. Another example would be a hospital providing local GPs with access to a booking system so they can make appointments for their patients.

An extranet should be more efficient because everyone has access to the same data in the same format. Because all extranet communications can be encrypted over a VPN, it should also be more secure than sending data over the public internet.


Question

  1. How is an extranet different from the internet?
Write the answer in your revision powerpoint!

Extension question:

  1. Whatare the potential drawbacks of Intranets and extranetst?


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Teacher Date: 2019-06-26


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