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batu pahat, johor, Malaysia

Friday, August 6, 2010

berkaitan NET~

today ye anak2, we learn about COMPUTER NETWORK..
hurmmmm, ade tak ciri-ciri cekgu??hehy...
hari ni ari sabtu, kne dtg sekolah...walwpun ta ramai, dtg jelah...~
then mse ict tdi ade 7 ketol je yg dtg....so cegu suwoh buat keje masing2 n cry INTERNET,INTRANET & EXTRANET.

oke-oke..could we start our lesson now??
pelajar 7 ketul pun menjawab: yes teacher!


A global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. Unlike online services, which are centrally controlled, the Internet is decentralized by design. Each Internet computer, called a host, is independent. Its operators can choose which Internet services to use and which local services to make available to the global Internet community. Remarkably, this anarchy by design works exceedingly well. There are a variety of ways to access the Internet. Most online services, such as America Online, offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP).


- An intranet is a private network that is contained within anenterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network. Typically, an intranet includes connections through one or more gateway computers to the outside Internet. The main purpose of an intranet is to share company information and computing resources among employees. An intranet can also be used to facilitate working in groups and for teleconferences.

An intranet uses TCP/IP, HTTP, and other Internet protocols and in general looks like a private version of the Internet. With tunneling, companies can send private messages through the public network, using the public network with special encryption/decryption and other security safeguards to connect one part of their intranet to another.

Typically, larger enterprises allow users within their intranet to access the public Internet through firewall servers that have the ability to screen messages in both directions so that company security is maintained. When part of an intranet is made accessible to customers, partners, suppliers, or others outside the company, that part becomes part of an extranet.


- An extranet is a private network that uses Internet technology and the public telecommunication system to securely share part of a business's information or operations with suppliers, vendors, partners, customers, or other businesses. An extranet can be viewed as part of a company's intranet that is extended to users outside the company. It has also been described as a "state of mind" in which the Internet is perceived as a way to do business with other companies as well as to sell products to customers.

An extranet requires security and privacy. These can include firewall server management, the issuance and use of digital certificates or similar means of user authentication, encryption of messages, and the use of virtual private networks (VPNs) that tunnel through the public network.

Companies can use an extranet to:

  • Exchange large volumes of data using Electronic Data Interchange (EDI)
  • Share product catalogs exclusively with wholesalers or those "in the trade"
  • Collaborate with other companies on joint development efforts
  • Jointly develop and use training programs with other companies
  • Provide or access services provided by one company to a group of other companies, such as an online banking application managed by one company on behalf of affiliated banks
  • Share news of common interest exclusively with partner companies
okelah...sekian saja lesson kita pada hari ini.....bye2


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