{"id":183803,"date":"2011-07-04T19:20:00","date_gmt":"2011-07-04T17:20:00","guid":{"rendered":"https:\/\/cms.galaxiemedia.fr\/tomshardware\/2011\/07\/04\/airdrop-le-wi-fi-direct-dapple-a-des-limites\/"},"modified":"2023-06-22T19:43:09","modified_gmt":"2023-06-22T17:43:09","slug":"airdrop-le-wi-fi-direct-dapple-a-des-limites","status":"publish","type":"post","link":"https:\/\/www.tomshardware.fr\/airdrop-le-wi-fi-direct-dapple-a-des-limites\/","title":{"rendered":"AirDrop, le Wi-Fi Direct d&#8217;Apple a des limites"},"content":{"rendered":"<p><span class=\"imgContent imgRight\"><span class=\"iZoom\"><img alt=\"Image 1 : AirDrop, le Wi-Fi Direct d&#039;Apple a des limites\" decoding=\"async\" width=\"200\" height=\"146\" src=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2011\/07\/capture-2011-07-04-a-13-54-46-200x146.png\" class=\"attachment-purch-200 size-purch-200\" alt=\"\" \/><\/span><\/span><\/p>\n<\/p>\n<p>Apple, dans Mac OS X Lion, propose un nouvel outil de partage de fichiers, AirDrop. L&#8217;id\u00e9e est s\u00e9duisante : ce syst\u00e8me int\u00e9gr\u00e9 au Finder permet de partager des fichiers rapidement entre deux utilisateurs. Le fonctionnement est simple : on clique sur AirDrop, la liste des personnes \u00e0 proximit\u00e9 appara\u00eet et il suffit de glisser un fichier pour qu&#8217;il soit transmis. Un \u00ab pop-up \u00bb appara\u00eet sur la machine h\u00f4te pour accepter le fichier, et le transfert s&#8217;effectue. <\/p>\n<\/p>\n<h4>Les limites et le fonctionnement interne<\/h4>\n<\/p>\n<p>Sous cette apparence simple, AirDrop est techniquement assez int\u00e9ressant : c&#8217;est une liaison directe qui est cr\u00e9\u00e9e entre les deux ordinateurs qui se partagent les donn\u00e9es. La liaison se fait en Wi-Fi 802.11n dans la bande des 5 GHz pour obtenir des d\u00e9bits \u00e9lev\u00e9s (450 m\u00e9gabits\/s sur les machines r\u00e9centes) et les donn\u00e9es ne passent donc pas par le r\u00e9seau classique, la liaison est d\u00e9di\u00e9e. <strong>Le fonctionnement est proche de ce que propose la norme Wi-Fi Direct ou le Bluetooth 3.0<\/strong>, mais Apple utilise ici Bonjour et cache le plus possible le fonctionnement interne de sa technologie.<\/p>\n<\/p>\n<p>Le probl\u00e8me principal est que pour fonctionner, AirDrop a besoin d&#8217;une carte Wi-Fi \u2014 certaines machines Apple ne sont pas \u00e9quip\u00e9es \u2014 compatible avec la technologie 802.11n et capable de travailler en \u00ab dual band \u00bb. Ce dernier point est le plus g\u00eanant : toutes les cartes ne sont pas capables de travailler sur deux bandes simultan\u00e9ment. Concr\u00e8tement, Apple utilise trois cartes 802.11n dans ses cartes : des Atheros, des Broadcom de type 432x et des Broadcom de type 943x. Et seules les derni\u00e8res sont compatibles.<\/p>\n<\/p>\n<p>Pour les amateurs de Hackintosh, il va donc \u00eatre difficile de prendre en charge AirDrop : la majorit\u00e9 des cartes du march\u00e9 sont des Broadcom 432x. Et pour les utilisateurs de machines Apple, seules les machines sorties depuis fin 2008 (et encore, pas toutes) seront compatibles.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apple, dans Mac OS X Lion, propose un nouvel outil de partage de fichiers, AirDrop.<\/p>","protected":false},"author":36,"featured_media":183804,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[487,4068,4111],"tags":[576,814],"hubs":[],"acf":{"post_show_excerpt":false,"post_source":{"title":"Tom's Hardware FR","url":"https:\/\/www.tomshardware.fr\/","target":""}},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AirDrop, le Wi-Fi Direct d&#039;Apple a des limites<\/title>\n<meta name=\"description\" content=\"Apple, dans Mac OS X Lion, propose un nouvel outil de 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