{"id":94373,"date":"2009-11-06T17:30:00","date_gmt":"2009-11-06T16:30:00","guid":{"rendered":"https:\/\/cms.galaxiemedia.fr\/tomshardware\/2009\/11\/06\/liss-et-sa-connexion-a-internet\/"},"modified":"2023-06-22T19:43:42","modified_gmt":"2023-06-22T17:43:42","slug":"liss-et-sa-connexion-a-internet","status":"publish","type":"post","link":"https:\/\/www.tomshardware.fr\/liss-et-sa-connexion-a-internet\/","title":{"rendered":"L&#8217;ISS et sa connexion \u00e0 Internet"},"content":{"rendered":"<p><span class=\"imgContent imgRight\"><span class=\"iZoom\"><img alt=\"Image 1 : L&#039;ISS et sa connexion \u00e0 Internet\" decoding=\"async\" width=\"200\" height=\"117\" src=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2010\/05\/voyager2-200x117.jpg\" class=\"attachment-purch-200 size-purch-200\" alt=\"\" \/><\/span><\/span><\/p>\n<\/p>\n<p>Vous vous demandiez ce que les astronautes, les cosmonautes et les spationautes de la station spatiale internationale pouvaient faire de leurs journ\u00e9es ? Utiliser des ordinateurs \u00e9videmment. En effet, la station regorge de machines, essentiellement des Thinkpad (les PC portables de Lenovo) : on retrouve des Thinkpad A31 (68) et des Thinkpad T61p (32). Les PC portables (dont un est utilis\u00e9 comme \u00ab serveur \u00bb) sont reli\u00e9s entre eux via un r\u00e9seau local (\u00e0 base d&#8217;Ethernet et de Wi-Fi) et la connexion au monde ext\u00e9rieur se fait via une connexion satellite. Point amusant, cette connexion offre des d\u00e9bits plus \u00e9lev\u00e9s que ceux d&#8217;une bonne partie de la plan\u00e8te : 10 m\u00e9gabits\/s en r\u00e9ception et 3 m\u00e9gabits\/s en \u00e9mission.<\/p>\n<\/p>\n<p>Gros point noir, par contre, l&#8217;acc\u00e8s est indirect : dans la majorit\u00e9 des cas (sauf, par exemple, les conf\u00e9rences vid\u00e9o) l&#8217;acc\u00e8s doit passer par les serveurs de la NASA, qui gardent une copie compl\u00e8te des donn\u00e9es pr\u00e9sentes dans l&#8217;ISS. Dans les faits, la synchronisation avec l&#8217;ext\u00e9rieur ne s&#8217;effectue par exemple que trois fois par jour, les e-mails ne sont donc pas aussi rapides qu&#8217;ils devraient l&#8217;\u00eatre. La raison d&#8217;\u00eatre de cette limitation est simple : limiter l&#8217;impact des virus sur les machines.<\/p>\n<\/p>\n<p>Notons tout de m\u00eame, pour se faire une petite id\u00e9e, que la sonde Voyager 2 (sortie du syst\u00e8me solaire il y a d\u00e9j\u00e0 quelques ann\u00e9es) offre des d\u00e9bits bien moins \u00e9lev\u00e9s : entre la Terre et la sonde, la transmission s&#8217;effectue \u00e0 16 bits\/s et entre Voyager 2 et le plancher des vaches, il est possible de transf\u00e9rer 160 bits par seconde.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vous vous demandiez ce que les astronautes, les cosmonautes et les spationautes de la station spatiale internationale pouvaient faire de leurs journ\u00e9es ?<\/p>","protected":false},"author":36,"featured_media":87718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[487,4111],"tags":[],"hubs":[],"class_list":["post-94373","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite","category-internet-telecom"],"acf":{"post_show_excerpt":false,"post_source":{"title":"ReadWriteWeb","url":"http:\/\/www.readwriteweb.com\/archives\/astronauts_might_have_a_better_internet_connection.php","target":""}},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v23.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>L&#039;ISS et sa connexion \u00e0 Internet<\/title>\n<meta name=\"description\" content=\"Vous vous demandiez ce que les astronautes, les cosmonautes et les spationautes de la station spatiale internationale pouvaient faire de leurs 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