Qu’est-ce qu’une adresse IP, à quoi sert-elle et surtout, comment la protéger pour éviter à des logiciels malveillants de subtiliser nos données ?
Les différentes machines et divers appareils connectés sur internet (PC, serveurs, objets connectés, etc.) utilisent les adresses IP pour communiquer entre eux. Il s’agit du seul moyen de les retrouver et d’y accéder sur le réseau. Pour faciliter la vie des internautes et leur permettre d’accéder aux sites en saisissant une adresse compréhensible, les noms de domaine ont été créés. Il existe des bases de données qui mémorisent quelle adresse IP correspond à quel nom de domaine. Par exemple, en saisissant futura-sciences.com dans son navigateur, l’ordinateur contacte le serveur à l’adresse 5.135.141.70. Ces bases de données, ce sont les serveurs DNS. Chaque fournisseur d’accès propose ses propres serveurs avec les abonnements internet, utilisés par défaut par tous les ordinateurs qui s’y connectent.
Source: futura
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