A worldwide publicly accessibly network of interconnected computer networks or the internet has given the user of personal computer an international dimension. Your pc is now your window to the world. that you access through the world wide web that consists of interlinked documents and web pages that are a part of millions of websites , today if a pc is not connected to the Net , it is considered an anomaly , infect , pc themselves have evolved into laptop , the internet is a conglomeration of smaller networks and other connected



Machines spanning the entire global. it consist of over30,000 networks in 71 countries around the world , each country has at least one backbone network that operates at a very high speed and carrier the bulk of the traffic . Other smaller networks connect to that backbone.

the biggest manifestation of networking phenomenon is the internet, which spans across the global and has as many as 75 million user loading on to it at some point in time or the other.

The internet has no central authority network on the internet simply agree to cooperate with each other. individual computer on these networks can share files and transmit information ,various networks connected to the internet format massages with internet protocol (IP). IP is often used in conjunction with TCP (transmission control protocol). The combinations of TCP/IP have made the internet robust and flexible.

WHY USE THE INTERNET?

the internet has revolutionized that communication methods around the world sitting at a workstation or pc , one can get any kind of information one wants the latest technological advances have enabled it to be used as a business tool as well as , with the result that companies are today spending considerable amount of money on the internet research . the amalgamation of computer and communication technologies have resulted in the integration of data ,sound and video on the internet which in turn has made it a powerful tool for reengineering business processes the world over.

One can use the internet form for the following purpose:-

1)To exchange electronic mail with friends all over the global for a small price.

2) To participate in group discussions on topics of interest through the public news groups.

3)To find educational tools. Universities around the world, book stores and libraries are sharing online information.

4) the internet has become the first global venue for publishing information , this network has enough user now and is benefiting from the positive feed back loop: the more user it gets , them content it gets, the more user it gets.

The internet main asset is freedom an alternative to controlling its freedom is to train and educate the user.

Internet connection option:-

There is several ways to connect to the internet. The more expensive services provides more features, more flexibility

And greater data transfer capacity large companies choose dedicated internet access or LAN dial up. Smaller organizations are happy with pc dial up access or terminal emulation, which provides e-mail and other service through service provider’s computer.

After deciding what kind of internet connection you need, look for a service provider. A wide variety of providers’ support a wide variety of internet connection services .here are some hints:-

if you want to connect an individual pc to the internet , you can choose a national provider, if you want to connect several geographically scattered sites , contact one of the major national and regional internet providers. To get a dedicate line into the internet contact one of the leased line; the more traffic it can carry, the more expensive it will be.

A final word of caution before connecting your network to the internet. A large number of people have made it their pastime to break into computer networks. There are many stories of companies that have plugged their networks into the internet, not realizing that at that point.

which ever system you choose , make sure it is implemented , it is easy to believe that you are invisible , but that is not true , tools are now available to automatically scan for new IP addresses as well as weak point in your defenses . Set your security properly before you connect to the internet for the first time.