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4G
En télécommunications, 4G est la 4e génération des standards pour la téléphonie mobile. Elle est le successeur de la 3G et de la 2G. Elle permet le « très haut débit mobile », soit des transmissions de données à des débits théoriques supérieurs à 100 Mb/s. Ces débits seraient en pratique de l'ordre de quelques dizaines de Mb/s, suivant le nombre d'utilisateurs puisque la bande passante est partagée entre les terminaux actifs des utilisateurs présents dans une même cellule radio. La particularité de la 4G est de ne plus offrir de mode commuté, ce qui signifie que les communications téléphoniques utiliseront la voix sur IP. La société américaine Verizon a publié des spécifications qui rendent obligatoires les téléphones sachant utiliser l'IPv6 pour utiliser son réseau 4G.
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