what is internet

 INTERNET AND INTRANET

BY ABHAY MISHRA
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HELLO FRIENDS TODAY WE DISCUSS MOST IMPORTANT TOPIC ....


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Internet:
The Internet, sometimes called simply "the Net," is a worldwide
system of computer networks - a network of networks in which
users at any one computer can, if they have permission, get
information from any other computer. It is a worldwide system
which has the following characteristics:


1. Internet is a world-wide / global system of interconnected
computer networks.
2. Internet uses the standard Internet Protocol (TCP/IP)
3. Every computer in internet is identified by a unique IP
address.
4. IP Address is a unique set of numbers (such as 110.22.33.114) which identifies a computer’s location.
5. A special computer DNS (Domain Name Server) is used to give name to the IP Address so that user can locate
a computer by a name.
6. For example, a DNS server will resolve a name http://www.amclubelearn.in to a particular IP address to
uniquely identify the computer on which this website is hosted.
7. Internet is accessible to every user all over the world.

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Intranet
An intranet is a private network that is contained within an enterprise. 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.


 Intranet is system in which multiple PCs are connected to each other.
 PCs in intranet are not available to the world outside the intranet.
 Usually each company or organisation has their own Intranet network and members/employees of that company can access the computers in their intranet.
 Each computer in Intranet is also identified by an IP Address which is unique among the computers in that Intranet.
Similarities in Internet and Intranet
 Intranet uses the internet protocols such as TCP/IP and FTP.
 Intranet sites are accessible via web browser in similar way as websites in internet. But only members of
Intranet network can access intranet hosted sites.
 In Intranet, own instant messengers can be used as similar to yahoo messenger/ g talk over the internet.
Differences in Internet and Intranet
 Internet is general to PCs all over the world whereas Intranet is specific to few PCs.
 Internet has wider access and provides a better access to websites to large population whereas Intranet is restricted.
 Internet is not as safe as Intranet as Intranet can be safely privatised as per the need.

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