{"id":1012989,"date":"2023-09-03T23:44:31","date_gmt":"2023-09-03T23:44:31","guid":{"rendered":"https:\/\/beta-new.inhand.com\/?p=6779"},"modified":"2026-06-04T00:44:27","modified_gmt":"2026-06-04T00:44:27","slug":"what-is-ospf","status":"publish","type":"post","link":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf","title":{"rendered":"Open Shortest Path First (OSPF) \u3068\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"1012989\" class=\"elementor elementor-1012989\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f5deb9f e-con-full anli_box e-flex e-con e-parent\" data-id=\"f5deb9f\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6c1a9e e-con-full anli_box_l e-flex e-con e-child\" data-id=\"6c1a9e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34437fe7 elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"34437fe7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Open Shortest Path First (OSPF) \u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3775149e e-con-full e-flex e-con e-child\" data-id=\"3775149e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10a10b91 elementor-widget elementor-widget-heading\" data-id=\"10a10b91\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u30d6\u30ed\u30b0<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6bac9b35 e-con-full e-flex e-con e-child\" data-id=\"6bac9b35\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-788fe74d elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"788fe74d\" data-element_type=\"widget\" id=\"maodian1\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u4e3b\u306a\u30dd\u30a4\u30f3\u30c8<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-257fbef5 elementor-widget elementor-widget-heading\" data-id=\"257fbef5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">OSPF\u306f\u5178\u578b\u7684\u306a\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001\u901a\u5e38\u306f\u540c\u4e00\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c9\u30e1\u30a4\u30f3\u5185\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6167c32 elementor-widget elementor-widget-text-editor\" data-id=\"6167c32\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>OSPF\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><\/p><p>OSPF\u306f\u5178\u578b\u7684\u306a\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001\u901a\u5e38\u306f\u540c\u4e00\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c9\u30e1\u30a4\u30f3\u5185\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u3044\u3046\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c9\u30e1\u30a4\u30f3\u3068\u306f\u3001\u81ea\u5f8b\u30b7\u30b9\u30c6\u30e0\uff08AS\uff09\u3092\u6307\u3057\u3001\u7d71\u4e00\u3055\u308c\u305f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30dd\u30ea\u30b7\u30fc\u307e\u305f\u306f\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4ecb\u3057\u3066\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u76f8\u4e92\u306b\u4ea4\u63db\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7fa4\u306e\u3053\u3068\u3067\u3059\u3002\u3053\u306eAS\u5185\u3067\u306f\u3001\u3059\u3079\u3066\u306eOSPF\u30eb\u30fc\u30bf\u304c\u3001\u3053\u306eAS\u306e\u69cb\u9020\u3092\u8a18\u8ff0\u3059\u308b\u540c\u4e00\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4fdd\u6301\u3057\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c9\u30e1\u30a4\u30f3\u5185\u306e\u5bfe\u5fdc\u3059\u308b\u30ea\u30f3\u30af\u306e\u72b6\u614b\u60c5\u5831\u3092\u683c\u7d0d\u3057\u307e\u3059\u3002OSPF\u30eb\u30fc\u30bf\u306f\u3001\u3053\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u57fa\u3065\u3044\u3066OSPF\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p><p>\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308bOSPF\u306f\u3001\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u30c7\u30fc\u30bfLSA\uff08\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u30e1\u30f3\u30c8\uff09\u3092\u7279\u5b9a\u306e\u30a8\u30ea\u30a2\u5185\u306e\u3059\u3079\u3066\u306e\u30eb\u30fc\u30bf\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u8ddd\u96e2\u30d9\u30af\u30c8\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002\u8ddd\u96e2\u30d9\u30af\u30c8\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9f\u884c\u3059\u308b\u30eb\u30fc\u30bf\u306f\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306e\u4e00\u90e8\u307e\u305f\u306f\u5168\u90e8\u3092\u30cd\u30a4\u30d0\u30fc\u306b\u6e21\u3057\u307e\u3059\u3002<\/p><p>\u60c5\u5831\u4ea4\u63db\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u3057\u3066\u3001OSPF \u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u30eb\u30fc\u30bf\u306e\u307f\u304c\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3092\u914d\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u30eb\u30fc\u30bf\u9593\u306e\u60c5\u5831\u4ea4\u63db\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a8d\u8a3c\u3067\u304d\u308b\u3068\u898f\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002OSPF \u306f\u3055\u307e\u3056\u307e\u306a\u8a8d\u8a3c\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u7570\u306a\u308b\u30a8\u30ea\u30a2\u3067\u7570\u306a\u308b\u8a8d\u8a3c\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u63a1\u7528\u3067\u304d\u307e\u3059\u3002\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af (\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306a\u3069) \u306b\u304a\u3051\u308b OSPF \u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8 \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9069\u7528\u306f\u3001\u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8 \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u914d\u4fe1\u3059\u308b\u305f\u3081\u306b\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2 \u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u6a5f\u80fd\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u3088\u3046\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u901a\u5e38\u3001\u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8 \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u30c8\u30dd\u30ed\u30b8\u56f3\u306e\u30ce\u30fc\u30c9\u306f\u30eb\u30fc\u30bf\u3092\u8868\u3057\u307e\u3059\u3002k \u53f0\u306e\u30eb\u30fc\u30bf\u3059\u3079\u3066\u304c\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8\u304c\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3055\u308c\u308b\u3068\u3001\u3053\u308c\u3089\u306e k \u53f0\u306e\u30eb\u30fc\u30bf\u306b\u95a2\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6570\u306f k \u306e\u4e8c\u4e57\u306b\u9054\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001OSPF \u3067\u306f\u3001\u30c8\u30dd\u30ed\u30b8\u56f3\u3067\u30ce\u30fc\u30c9\u304c\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5404\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u3059\u3079\u3066\u306e\u30eb\u30fc\u30bf\u306f\u3001\u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8 \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30eb\u30fc\u30bf\u306e\u30ea\u30f3\u30af \u30b9\u30c6\u30fc\u30c8\u3092\u5831\u544a\u3057\u307e\u3059\u3002<\/p><p><span style=\"font-size: inherit; text-align: inherit; font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); background-color: var(--palettecolor8); color: var(--color); font-style: var(--fontStyle, inherit); letter-spacing: var(--letterSpacing); text-transform: var(--textTransform);\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aca051a elementor-widget elementor-widget-text-editor\" data-id=\"aca051a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>\u52d5\u4f5c\u539f\u7406<\/strong><\/p><p>\u7c21\u5358\u306b\u8a00\u3046\u3068\u3001OSPF\u3068\u306f\u3001\u96a3\u63a5\u3059\u308b2\u3064\u306e\u30eb\u30fc\u30bf\u304c\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u30cd\u30a4\u30d0\u30fc\u3068\u306a\u308a\u3001\u305d\u306e\u5f8c\u3001\u30cd\u30a4\u30d0\u30fc\u540c\u58eb\u304c\u30ea\u30f3\u30af\u72b6\u614b\u60c5\u5831\u3092\u9001\u53d7\u4fe1\u3057\u3066\u96a3\u63a5\u95a2\u4fc2\u3092\u78ba\u7acb\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u305d\u306e\u5f8c\u3001\u5404\u30eb\u30fc\u30bf\u306f\u6700\u77ed\u7d4c\u8def\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u5f93\u3063\u3066\u7d4c\u8def\u3092\u8a08\u7b97\u3057\u3001OSPF\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002\u4ed6\u306e\u7d4c\u8def\u3068\u6bd4\u8f03\u3057\u3066\u3001OSPF\u7d4c\u8def\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u52a0\u3055\u308c\u308b\u306e\u304c\u671b\u307e\u3057\u3044\u3067\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u5168\u4f53\u306f\u30015\u7a2e\u985e\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30013\u3064\u306e\u30b9\u30c6\u30fc\u30b8\u30014\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p><p><strong>5\u7a2e\u985e\u306e\u30e1\u30c3\u30bb\u30fc\u30b8<\/strong><\/p><p>\u3053\u3093\u306b\u3061\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a\u8fd1\u96a3\u4f4f\u6c11\u3068\u306e\u95a2\u4fc2\u3092\u7bc9\u304d\u3001\u7dad\u6301\u3057\u307e\u3057\u3087\u3046\u3002<\/p><p>DBD\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a\u30ea\u30f3\u30af\u72b6\u614b\u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p><p>LSR\u30e1\u30c3\u30bb\u30fc\u30b8\uff1aDBD\u304b\u3089\u53d6\u5f97\u3057\u305f\u5fc5\u8981\u306a\u30ea\u30f3\u30af\u72b6\u614b\u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u3092\u30cd\u30a4\u30d0\u30fc\u306b\u9001\u4fe1\u3057\u3001\u5b8c\u5168\u306a\u60c5\u5831\u3092\u8981\u6c42\u3057\u307e\u3059\u3002<\/p><p>LSU\u30e1\u30c3\u30bb\u30fc\u30b8\uff1aLSR\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u306b\u5bfe\u5fdc\u3059\u308b\u5b8c\u5168\u306a\u60c5\u5831\u3092\u8fd1\u96a3\u30ce\u30fc\u30c9\u306b\u9001\u4fe1\u3059\u308b\u3002<\/p><p>LSACK\uff1aLSU\u304b\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u3063\u305f\u3089\u3001\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><p><strong>3\u3064\u306e\u6bb5\u968e<\/strong><\/p><p>\u8fd1\u96a3\u30ce\u30fc\u30c9\u306e\u767a\u898b\uff1aHello\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u8fd1\u96a3\u30ce\u30fc\u30c9\u3068\u306e\u95a2\u4fc2\u304c\u78ba\u7acb\u3055\u308c\u307e\u3059\u3002<\/p><p>\u7d4c\u8def\u901a\u77e5\uff1a\u8fd1\u96a3\u30ce\u30fc\u30c9\u306f\u30ea\u30f3\u30af\u72b6\u614b\u60c5\u5831\u3092\u9001\u4fe1\u3057\u3066\u96a3\u63a5\u95a2\u4fc2\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002<\/p><p>\u8a08\u7b97\uff1a\u6700\u77ed\u7d4c\u8def\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u5f93\u3063\u3066\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p><p><strong>\u30c6\u30fc\u30d6\u30eb4\u3064<br \/><\/strong><\/p><p>\u30cd\u30a4\u30d0\u30fc\u30c6\u30fc\u30d6\u30eb\uff1a\u4e3b\u306b\u30cd\u30a4\u30d0\u30fc\u95a2\u4fc2\u3092\u5f62\u6210\u3059\u308b\u30eb\u30fc\u30bf\u30fc\u3092\u8a18\u9332\u3057\u307e\u3059\u3002<\/p><p>\u30ea\u30f3\u30af\u72b6\u614b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff1a\u30ea\u30f3\u30af\u72b6\u614b\u60c5\u5831\u3092\u8a18\u9332\u3057\u307e\u3059\u3002<\/p><p>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\uff1a\u30ea\u30f3\u30af\u72b6\u614b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3002<\/p><p>\u30b0\u30ed\u30fc\u30d0\u30eb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\uff1aOSPF\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u4ed6\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1e87d53 e-con-full e-flex e-con e-child\" data-id=\"1e87d53\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a14c13b e-con-full anli_l_st e-flex e-con e-child\" data-id=\"a14c13b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_offset&quot;:90,&quot;sticky_effects_offset&quot;:100,&quot;sticky_anchor_link_offset&quot;:100,&quot;sticky_parent&quot;:&quot;yes&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;]}\">\n\t\t<div class=\"elementor-element elementor-element-1da7e082 e-con-full e-flex e-con e-child\" data-id=\"1da7e082\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-69473ed elementor-widget elementor-widget-heading\" data-id=\"69473ed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u7d9a\u304d\u3092\u8aad\u3080 <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-108ac635 elementor-widget elementor-widget-shortcode\" data-id=\"108ac635\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">    <style>\n        \/* --- \u8fd9\u91cc\u7684\u53c2\u6570\u5168\u90e8\u4fdd\u7559\u4f60\u7684\u4fee\u6539 --- *\/\n        .vpro-wrapper {\n            width: 100%;\n            max-width: 25rem;\n            height: 38.5rem;\n            overflow-y: auto;\n            overflow-x: hidden;\n            \/* 1. \u589e\u52a0\u5e95\u90e8\u5185\u8fb9\u8ddd\uff0c\u5236\u9020\u865a\u7a7a\u611f *\/\n            padding: 0.3125rem 0.3125rem 0rem 0.3125rem;\n            scrollbar-width: thin;\n            box-sizing: border-box;\n        }\n\n        .vpro-wrapper::-webkit-scrollbar { width: 0.25rem; }\n        .vpro-wrapper::-webkit-scrollbar-thumb { background: #ccc; border-radius: 0.625rem; }\n\n        .vpro-item {\n            width: 100%;\n            height: 21rem;\n            margin-bottom: 1rem;\n            background: #fff;\n            border: 0.0625rem solid #D7D7D7;\n            border-radius: 0.5rem;\n            display: flex;\n            flex-direction: column;\n            flex-shrink: 0;\n            overflow: hidden;\n            box-sizing: border-box;\n            transition: all 0.3s ease;\n        }\n\n        .vpro-item:hover {\n            box-shadow: 0 0.5rem 1.25rem rgba(0,0,0,0.08);\n            transform: translateY(-0.125rem);\n        }\n\n        .vpro-img-box {\n            width: 100%;\n            height: 14rem; \/* \u4fdd\u7559\u4f60\u6539\u7684 10rem *\/\n            overflow: hidden;\n            background: #f5f5f5;\n            flex-shrink: 0;\n        }\n\n        .vpro-img-box img {\n            width: 100%;\n            height: 100%;\n            object-fit: cover;\n            object-position: center;\n            display: block;\n        }\n\n        .vpro-content {\n            padding: 0.5rem 0.5rem 0.8rem 1.25rem;\n            flex-grow: 1;\n            display: flex;\n            align-items: center;\n        }\n\n        .vpro-title {\n            font-size: 1.25rem; \/* \u4fdd\u7559\u4f60\u6539\u7684 1.5rem *\/\n            font-weight: 500;\n            line-height: 1.4;\n            color: #000;\n            display: -webkit-box;\n            -webkit-line-clamp: 3; \/* \u4fdd\u7559\u4f60\u6539\u7684 3 \u884c *\/\n            -webkit-box-orient: vertical;\n            overflow: hidden;\n            text-decoration: none;\n        }\n\n        .vpro-title a {\n            text-decoration: none;\n            color: inherit;\n        }\n\n        \/* 2. \u589e\u52a0\u4e00\u4e2a\u7269\u7406\u5360\u4f4d\u7b26\uff0c\u786e\u4fdd\u6eda\u52a8\u5230\u5e95\u90e8\u6709\u4f59\u91cf *\/\n        .vpro-bottom-spacer {\n            height: 4rem;\n            width: 100%;\n            flex-shrink: 0;\n        }\n    <\/style>\n\n    <div class=\"vpro-wrapper\">\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/cases\/road-monitoring-sd-wan\">\n                                                    <img fetchpriority=\"high\" decoding=\"async\" width=\"1360\" height=\"540\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring.png\" class=\"attachment-full size-full wp-post-image\" alt=\"InHand\u306eSD-WAN\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u4ecb\u3057\u3066\u63a5\u7d9a\u3055\u308c\u305f\u5206\u6563\u578b\u9053\u8def\u76e3\u8996\u30b5\u30a4\u30c8\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring.png 1360w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring-300x119.png 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring-768x305.png 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring-18x7.png 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2023\/10\/SD-WAN-networking-facilitates-distributed-road-monitoring-600x238.png 600w\" sizes=\"(max-width: 1360px) 100vw, 1360px\" \/>                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/cases\/road-monitoring-sd-wan\">\u5206\u6563\u578b\u9053\u8def\u76e3\u8996\u306e\u305f\u3081\u306eSD-WAN\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/industries\/intelligent-public-transport-system-2\">\n                                                    <div style=\"width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#eee;color:#999;\">\u753b\u50cf\u306a\u3057<\/div>\n                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/industries\/intelligent-public-transport-system-2\">\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30c8\u516c\u5171\u4ea4\u901a\u30b7\u30b9\u30c6\u30e0<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/cases\/wireless-connectivity-for-dr-imaging-device\">\n                                                    <img decoding=\"async\" width=\"1780\" height=\"660\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner.jpg 1780w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner-300x111.jpg 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner-768x285.jpg 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner-1536x570.jpg 1536w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner-18x7.jpg 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/Wireless-Connectivity-for-DR-Imaging-Device-banner-600x222.jpg 600w\" sizes=\"(max-width: 1780px) 100vw, 1780px\" \/>                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/cases\/wireless-connectivity-for-dr-imaging-device\">DR\u30a4\u30e1\u30fc\u30b8\u30f3\u30b0\u88c5\u7f6e\u5411\u3051\u30ef\u30a4\u30e4\u30ec\u30b9\u63a5\u7d9a<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-business-travels\">\n                                                    <img decoding=\"async\" width=\"1780\" height=\"660\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner.jpg 1780w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner-300x111.jpg 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner-768x285.jpg 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner-1536x570.jpg 1536w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner-18x7.jpg 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Business-Travels-banner-600x222.jpg 600w\" sizes=\"(max-width: 1780px) 100vw, 1780px\" \/>                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-business-travels\">\u51fa\u5f35\u6642\u306e5G\u63a5\u7d9a<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-small-retail-stores\">\n                                                    <img loading=\"lazy\" decoding=\"async\" width=\"1780\" height=\"660\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner.jpg 1780w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner-300x111.jpg 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner-768x285.jpg 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner-1536x570.jpg 1536w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner-18x7.jpg 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-Small-Retail-Stores-banner-600x222.jpg 600w\" sizes=\"(max-width: 1780px) 100vw, 1780px\" \/>                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-small-retail-stores\">\u5c0f\u898f\u6a21\u5c0f\u58f2\u5e97\u5411\u30515G\u63a5\u7d9a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n                    <div class=\"vpro-item\">\n                <div class=\"vpro-img-box\">\n                    <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-rv-travel\">\n                                                    <img loading=\"lazy\" decoding=\"async\" width=\"1780\" height=\"660\" src=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner.jpg 1780w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner-300x111.jpg 300w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner-768x285.jpg 768w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner-1536x570.jpg 1536w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner-18x7.jpg 18w, https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/05\/5G-Connectivity-for-RV-Travel-banner-600x222.jpg 600w\" sizes=\"(max-width: 1780px) 100vw, 1780px\" \/>                                            <\/a>\n                <\/div>\n                <div class=\"vpro-content\">\n                    <div class=\"vpro-title\">\n                        <a href=\"https:\/\/www.inhand.com\/ja\/cases\/5g-connectivity-for-rv-travel\">\u30ad\u30e3\u30f3\u30d4\u30f3\u30b0\u30ab\u30fc\u65c5\u884c\u306e\u305f\u3081\u306e5G\u63a5\u7d9a<\/a>\n                    <\/div>\n                <\/div>\n            <\/div>\n        \n        <div class=\"vpro-bottom-spacer\"><\/div>\n    <\/div>\n    <\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>What is Open Shortest Path First (OSPF)? What is OSPF? OSPF is a typical Link-state routing protocol, which is generally used in the same routing domain. Here, the routing domain refers to an Autonomous System (AS), which refers to a group&#8230; Principle of operation To put it simply, OSPF means that two adjacent routers become neighbors by sending messages, and then neighbors send link state information to each other to form an adjacent r&#8230;<\/p>","protected":false},"author":1,"featured_media":960028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[817],"tags":[],"case_tag":[],"class_list":["post-1012989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding OSPF: Link-State Routing Protocol Fundamentals<\/title>\n<meta name=\"description\" content=\"Learn how OSPF works as a link-state routing protocol with authentication security. Explore OSPF&#039;s five message types, three operational stages, and four key tables for efficient routing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Open Shortest Path First (OSPF)?\" \/>\n<meta property=\"og:description\" content=\"OSPF is a typical Link-state routing protocol, which is generally used in the same routing domain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\" \/>\n<meta property=\"og:site_name\" content=\"InHand Networks\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-03T23:44:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-04T00:44:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"596\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"What is Open Shortest Path First (OSPF)?\" \/>\n<meta name=\"twitter:description\" content=\"OSPF is a typical Link-state routing protocol, which is generally used in the same routing domain.\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/f28b5f5eb652f2ac06a75a465b789734\"},\"headline\":\"What is Open Shortest Path First (OSPF)?\",\"datePublished\":\"2023-09-03T23:44:31+00:00\",\"dateModified\":\"2026-06-04T00:44:27+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\"},\"wordCount\":81,\"publisher\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png\",\"articleSection\":[\"blog\"],\"inLanguage\":\"ja\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\",\"url\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\",\"name\":\"Understanding OSPF: Link-State Routing Protocol Fundamentals\",\"isPartOf\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png\",\"datePublished\":\"2023-09-03T23:44:31+00:00\",\"dateModified\":\"2026-06-04T00:44:27+00:00\",\"description\":\"Learn how OSPF works as a link-state routing protocol with authentication security. Explore OSPF's five message types, three operational stages, and four key tables for efficient routing.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage\",\"url\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png\",\"contentUrl\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png\",\"width\":900,\"height\":596,\"caption\":\"See how OSPF facilitates efficient communication in industrial IoT infrastructure.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.inhand.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is Open Shortest Path First (OSPF)?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#website\",\"url\":\"https:\/\/www.inhand.com\/ja\/\",\"name\":\"inhand\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.inhand.com\/ja\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#organization\",\"name\":\"inhand\",\"url\":\"https:\/\/www.inhand.com\/ja\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2025\/10\/LOGO.png\",\"contentUrl\":\"https:\/\/www.inhand.com\/wp-content\/uploads\/2025\/10\/LOGO.png\",\"width\":684,\"height\":120,\"caption\":\"inhand\"},\"image\":{\"@id\":\"https:\/\/www.inhand.com\/ja\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/f28b5f5eb652f2ac06a75a465b789734\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/629c75063bd057cce2f443041efb70c2b7c38a823722dc38d646dcbac08e4183?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/629c75063bd057cce2f443041efb70c2b7c38a823722dc38d646dcbac08e4183?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"https:\/\/www.inhand.com\"],\"url\":\"https:\/\/www.inhand.com\/ja\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"OSPF\u306e\u7406\u89e3\uff1a\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u57fa\u790e","description":"OSPF\u304c\u8a8d\u8a3c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5099\u3048\u305f\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002OSPF\u306e5\u3064\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30bf\u30a4\u30d7\u30013\u3064\u306e\u52d5\u4f5c\u6bb5\u968e\u3001\u305d\u3057\u3066\u52b9\u7387\u7684\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306e4\u3064\u306e\u91cd\u8981\u306a\u30c6\u30fc\u30d6\u30eb\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf","og_locale":"ja_JP","og_type":"article","og_title":"What is Open Shortest Path First (OSPF)?","og_description":"OSPF is a typical Link-state routing protocol, which is generally used in the same routing domain.","og_url":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf","og_site_name":"InHand Networks","article_published_time":"2023-09-03T23:44:31+00:00","article_modified_time":"2026-06-04T00:44:27+00:00","og_image":[{"width":900,"height":596,"url":"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png","type":"image\/png"}],"author":"admin","twitter_card":"summary_large_image","twitter_title":"What is Open Shortest Path First (OSPF)?","twitter_description":"OSPF is a typical Link-state routing protocol, which is generally used in the same routing domain.","twitter_misc":{"\u57f7\u7b46\u8005":"admin","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"1\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#article","isPartOf":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf"},"author":{"name":"admin","@id":"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/f28b5f5eb652f2ac06a75a465b789734"},"headline":"What is Open Shortest Path First (OSPF)?","datePublished":"2023-09-03T23:44:31+00:00","dateModified":"2026-06-04T00:44:27+00:00","mainEntityOfPage":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf"},"wordCount":81,"publisher":{"@id":"https:\/\/www.inhand.com\/ja\/#organization"},"image":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage"},"thumbnailUrl":"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png","articleSection":["blog"],"inLanguage":"ja"},{"@type":"WebPage","@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf","url":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf","name":"OSPF\u306e\u7406\u89e3\uff1a\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u57fa\u790e","isPartOf":{"@id":"https:\/\/www.inhand.com\/ja\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage"},"image":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage"},"thumbnailUrl":"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png","datePublished":"2023-09-03T23:44:31+00:00","dateModified":"2026-06-04T00:44:27+00:00","description":"OSPF\u304c\u8a8d\u8a3c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5099\u3048\u305f\u30ea\u30f3\u30af\u30b9\u30c6\u30fc\u30c8\u578b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002OSPF\u306e5\u3064\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30bf\u30a4\u30d7\u30013\u3064\u306e\u52d5\u4f5c\u6bb5\u968e\u3001\u305d\u3057\u3066\u52b9\u7387\u7684\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306e4\u3064\u306e\u91cd\u8981\u306a\u30c6\u30fc\u30d6\u30eb\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002","breadcrumb":{"@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf"]}]},{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#primaryimage","url":"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png","contentUrl":"https:\/\/www.inhand.com\/wp-content\/uploads\/2026\/03\/OSPF-1.png","width":900,"height":596,"caption":"See how OSPF facilitates efficient communication in industrial IoT infrastructure."},{"@type":"BreadcrumbList","@id":"https:\/\/www.inhand.com\/ja\/support\/blogs\/what-is-ospf#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.inhand.com\/en\/"},{"@type":"ListItem","position":2,"name":"What is Open Shortest Path First (OSPF)?"}]},{"@type":"WebSite","@id":"https:\/\/www.inhand.com\/ja\/#website","url":"https:\/\/www.inhand.com\/ja\/","name":"\u624b\u5143\u306b","description":"","publisher":{"@id":"https:\/\/www.inhand.com\/ja\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.inhand.com\/ja\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ja"},{"@type":"Organization","@id":"https:\/\/www.inhand.com\/ja\/#organization","name":"\u624b\u5143\u306b","url":"https:\/\/www.inhand.com\/ja\/","logo":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.inhand.com\/ja\/#\/schema\/logo\/image\/","url":"https:\/\/www.inhand.com\/wp-content\/uploads\/2025\/10\/LOGO.png","contentUrl":"https:\/\/www.inhand.com\/wp-content\/uploads\/2025\/10\/LOGO.png","width":684,"height":120,"caption":"inhand"},"image":{"@id":"https:\/\/www.inhand.com\/ja\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/f28b5f5eb652f2ac06a75a465b789734","name":"\u7ba1\u7406\u8005","image":{"@type":"ImageObject","inLanguage":"ja","@id":"https:\/\/www.inhand.com\/ja\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/629c75063bd057cce2f443041efb70c2b7c38a823722dc38d646dcbac08e4183?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/629c75063bd057cce2f443041efb70c2b7c38a823722dc38d646dcbac08e4183?s=96&d=mm&r=g","caption":"admin"},"sameAs":["https:\/\/www.inhand.com"],"url":"https:\/\/www.inhand.com\/ja\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/posts\/1012989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/comments?post=1012989"}],"version-history":[{"count":0,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/posts\/1012989\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/media\/960028"}],"wp:attachment":[{"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/media?parent=1012989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/categories?post=1012989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/tags?post=1012989"},{"taxonomy":"case_tag","embeddable":true,"href":"https:\/\/www.inhand.com\/ja\/wp-json\/wp\/v2\/case_tag?post=1012989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}