{"id":3864,"date":"2026-03-21T17:24:40","date_gmt":"2026-03-21T16:24:40","guid":{"rendered":"https:\/\/hinakuu.xyz\/?p=3864"},"modified":"2026-03-21T17:27:37","modified_gmt":"2026-03-21T16:27:37","slug":"introduction-au-vlan","status":"publish","type":"post","link":"https:\/\/hinakuu.xyz\/?p=3864","title":{"rendered":"Introduction au VLAN"},"content":{"rendered":"\n<p>Un <strong>VLAN<\/strong> (Virtual Local Area Network) est un concept utilis\u00e9 en r\u00e9seau informatique pour <strong>segmenter un r\u00e9seau physique en plusieurs r\u00e9seaux logiques distincts<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-1024x683.png\" alt=\"\" class=\"wp-image-3865\" style=\"aspect-ratio:1.4992892477398079;width:750px;height:auto\" srcset=\"https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-1024x683.png 1024w, https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-300x200.png 300w, https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-768x512.png 768w, https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd27 En termes simples<\/h3>\n\n\n\n<p>Un VLAN permet de regrouper des appareils (ordinateurs, imprimantes, serveurs\u2026) <strong>comme s\u2019ils \u00e9taient sur le m\u00eame r\u00e9seau<\/strong>, m\u00eame s\u2019ils sont physiquement connect\u00e9s \u00e0 des \u00e9quipements diff\u00e9rents.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udca1 Pourquoi utiliser un VLAN ?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>S\u00e9curit\u00e9<\/strong> : les appareils d\u2019un VLAN ne peuvent pas communiquer directement avec ceux d\u2019un autre VLAN sans autorisation.<\/li>\n\n\n\n<li><strong>Organisation<\/strong> : s\u00e9parer les services (ex : RH, IT, invit\u00e9s\u2026).<\/li>\n\n\n\n<li><strong>Performance<\/strong> : r\u00e9duit le trafic inutile sur le r\u00e9seau.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\udde0 Exemple concret<\/h3>\n\n\n\n<p>Dans une entreprise :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN 10 \u2192 Service RH<\/li>\n\n\n\n<li>VLAN 20 \u2192 Service Informatique<\/li>\n\n\n\n<li>VLAN 30 \u2192 Wi-Fi invit\u00e9s<\/li>\n<\/ul>\n\n\n\n<p>M\u00eame si tout est branch\u00e9 au m\u00eame switch, chaque groupe est isol\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2699\ufe0f Comment \u00e7a fonctionne ?<\/h3>\n\n\n\n<p>Les VLAN sont configur\u00e9s sur des \u00e9quipements r\u00e9seau comme des switches (par exemple ceux de Cisco Systems ou Netgear).<br>Chaque port du switch peut \u00eatre associ\u00e9 \u00e0 un VLAN sp\u00e9cifique.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\udde9 \u00c0 retenir<\/h3>\n\n\n\n<p>\ud83d\udc49 Un VLAN = <strong>un r\u00e9seau virtuel s\u00e9par\u00e9 \u00e0 l\u2019int\u00e9rieur d\u2019un m\u00eame r\u00e9seau physique<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"525\" src=\"https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN.jpg\" alt=\"\" class=\"wp-image-3866\" srcset=\"https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN.jpg 800w, https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-300x197.jpg 300w, https:\/\/hinakuu.xyz\/wp-content\/uploads\/2026\/03\/VLAN-768x504.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Un VLAN (Virtual Local Area Network) est un concept utilis\u00e9 en r\u00e9seau informatique pour segmenter un r\u00e9seau physique<\/p>\n","protected":false},"author":1,"featured_media":3868,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-reseau"],"_links":{"self":[{"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/posts\/3864","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3864"}],"version-history":[{"count":4,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/posts\/3864\/revisions"}],"predecessor-version":[{"id":3871,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/posts\/3864\/revisions\/3871"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=\/wp\/v2\/media\/3868"}],"wp:attachment":[{"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3864"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3864"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hinakuu.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}