CLIL

CLASSE V C

ANNO SCOLASTICO 2016/2017

Author:VALLUZZI RAFFAELLA

References:UNI-ULM

INTERNETVariously defined, the Internet is basically the "network of networks", a set of computer networks all over the world and linked together, they can access thousands of users to provide each other binary information of various types definition.Technically the most correct definition of the Internet is perhaps that of a federation or a set of networks that can communicate using the set of TCP / IP protocols "(MARTIGNAGO E.- PASTERIS V.-ROMAGNOLO St., Sixth Power, Apogee, Milan , 1997).Beyond the attempt to define it, we have been used several analogies to describe the Internet; the most common is that of the local or national telephone networks which together form a huge international network, of which many have a part, no one can own it all; In fact it is said that the Internet is not anyone, though - because everything works - everyone must keep the efficiency of their properties.

The word Internet, before even indicate an electronic highway is primarily an English expression formed by two words entire net (network), used to describe a connection between two networks (computer) via a gateway (via d ' access): is this connection that allows any computer to a network to communicate with any other computer in another network.

To connect to the Internet must first connect with a modem, our computer to a telephone line which in turn connects us, always with a modem, the provider's computer. The quality of a provider is measured in fact also the speed with which its equipment allows us to gain access to the Internet. The provider's modems are in turn connected to a big computer is technically called host and that makes the relation to the customer's computer server function (client).In this way the client computer, as long as the connection with the provider's host, comes to be physically part of the network; You can then take advantage of all the services that the Internet is able to offer, from e-mail to research on so-called search engines, of course, up to the consultation of Web pages.