Chapter IV: Infrastructure Of Online Trading Part-2:

Network composed of several networks:

If we go back a few years back, we find that the companies were severely affected by the delivery of information Online forms and send to its employees, even to the particular geographic locations that are remote and inhabited A lot of people.

But now, the company was able to send any information to any employee or customer or trading partner Or the general public in any place they are.
Many experts attribute the cause of this development to the Web. But not for God, not 30 years or more of the investment and infrastructure development of the global network (Internet), what we have been able to Get on the web.

Many people use the Internet on a daily basis, but few understand how it works.
In terms of Material) the physical), the Internet is a network of thousands of networks connected with each other. It is within these networks connected with each other:

1 -Fiqripalmtsalp columns with each other and that have a global reach
2 - A multitude of networks and the entry of partial distribution Thousands of institutional and private networks, which reach between servers of different organizations and companies) Which contains a lot of useful information. Is Backbones checks by service providers which include companies such as BBN Planet. And PSINet and UUNET / MIS, Sprint, MCI.
Each spinal column can send more than 300 terabytes each month.

Micro-distribution networks for service providers by local and regional. Are exchanging data between online service providers and network service providers in the network entry points When you request information or data from your computer through the computer, the demand in most of the time will pass first Through a network of online service providers and then pass on the spinal column and one or more and then up to Another network of online service providers and finally to the computer, which has the information you requested.
The answer to the request will pass the same way before.
However, each request and each answer there is no specific course Or previously installed. Rather, the request and the answer will be physically divided into parcels and each parcel into the path of The waves are special devices have a router.
These different routes are being planned against it by the Updated maps of the networks on the Internet and through these maps can demarcation routers Tracks of the packages.