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Internet, Intranet and Extranet (Internet (Characteristics (Availability…

- - - - Available to the whole world
    - - Web pages are available to anyone - other resources may require usernames and passwords
    - - Infrastructure provided to connect computers together across the globe
    - - Uses telecommunications systems such as telephone lines, leased lines, mobile phones and satellites
    - - Uses TCP/IP protocol
  - - - Provides email communication to any other internet connected user
    - - Web pages can be visited anywhere in the worked wide web to find out publicly available information
    - - Chat conversations can take place with any other internet connected user
    - - Files can be transferred to/from any file transfer site
    - - Anybody can access information that is freely avaibale on the internet- it is an open network
- - - - Enables communication within an organisation
    - - Uses LANs or virtual networks across a WAN
    - - Requires username and password to gain access
    - - Uses the TCP/IP protocol
    - - Only available within the physical network infrastructure of an organisation
  - - - Email communication only to other members of the organisation
    - - Web pages within an organisation can be visited to find interval information about the organisation
    - - Chat conversations with other employees within an organisation
    - - Files that belong to the organisation can be downloaded for use within the organisation
    - - Shared information is securely retained within the organisation so external users cannot gain access- closed network
- - - - Employees do not have to be physically within organisations premises but providing access from the internet means there is a security risk if a hacker can find out a username and password
    - - Employees working away from the office can chat with colleagues
    - - Employees working away from the office can send and receive internal emails
    - - Employees working away from the office can find internal information about the organisation
    - - Employees working away from the office can download files needed to carry out their duties
  - - - Available from the internet, but only to employees within an organisation
    - - Requires a username and password to gain access
    - - Enables communication within an organisation from the internet connected computer
    - - Uses the internet to provide access to an intranet
    - - Uses the TCP/IP protocol