{"id":118,"date":"2025-02-11T06:41:00","date_gmt":"2025-02-10T21:41:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=118"},"modified":"2025-10-09T10:24:17","modified_gmt":"2025-10-09T01:24:17","slug":"11-icmp","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=118","title":{"rendered":"ICMP"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">ICMP\u3068\u306f<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><span class=\"swl-marker mark_yellow\">ICMP\uff08Internet Control Message Protocol\uff09<\/span><\/strong><br>\u2192 IP\u306e\u4ef2\u9593\u3067\u3001<strong>\u901a\u4fe1\u30a8\u30e9\u30fc\u306e\u901a\u77e5<\/strong> \u3084 <strong>\u5236\u5fa1\u30e1\u30c3\u30bb\u30fc\u30b8<\/strong> \u3092\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3002<\/li>\n\n\n\n<li>TCP\/IP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067 <strong>\u901a\u4fe1\u72b6\u614b\u3092\u78ba\u8a8d<\/strong> \u3059\u308b\u3068\u304d\u306b\u4f7f\u308f\u308c\u308b\u3002<\/li>\n\n\n\n<li>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u306f\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u300d\u306b\u4f4d\u7f6e\u3059\u308b\u3002<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<p class=\"is-style-big_icon_point wp-block-paragraph\">\u300cping\uff08\u30d4\u30f3\u30b0\uff09\u300d\u3084\u300ctraceroute\uff08\u30c8\u30ec\u30fc\u30b9\u30eb\u30fc\u30c8\uff09\u300d\u3067\u3088\u304f\u767b\u5834\u3059\u308b\u306e\u304cICMP\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ICMP\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ICMP\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u4ee5\u4e0b\u306e4\u3064\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d5\u30a3\u30fc\u30eb\u30c9<\/th><th>\u82f1\u8a9e\u8868\u8a18<\/th><th>\u30d3\u30c3\u30c8\u6570<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u30bf\u30a4\u30d7<\/td><td>Type<\/td><td>8bit<\/td><td>\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u7a2e\u985e\uff08\u30a8\u30b3\u30fc\u8981\u6c42\u3001\u5230\u9054\u4e0d\u80fd\u306a\u3069\uff09<\/td><\/tr><tr><td>\u30b3\u30fc\u30c9<\/td><td>Code<\/td><td>8bit<\/td><td>\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8a73\u7d30\u5185\u5bb9<\/td><\/tr><tr><td>\u30c1\u30a7\u30c3\u30af\u30b5\u30e0<\/td><td>Checksum<\/td><td>16bit<\/td><td>\u30a8\u30e9\u30fc\u691c\u51fa\u7528<\/td><\/tr><tr><td>\u30c7\u30fc\u30bf<\/td><td>Data<\/td><td>\u53ef\u5909\u9577<\/td><td>\u30bf\u30a4\u30d7\u3054\u3068\u306b\u7570\u306a\u308b\u8ffd\u52a0\u60c5\u5831<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"is-style-big_icon_point wp-block-paragraph\">\ud83d\udca1 <strong>\u30a4\u30e1\u30fc\u30b8<\/strong><br>\u300c\u30bf\u30a4\u30d7\uff1d\u5927\u304d\u306a\u304f\u304f\u308a\u300d\u300c\u30b3\u30fc\u30c9\uff1d\u7d30\u304b\u3044\u7406\u7531\u300d\u300c\u30c7\u30fc\u30bf\uff1d\u304a\u307e\u3051\u60c5\u5831\u300d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ICMP\u306e2\u7a2e\u985e\u306e\u30e1\u30c3\u30bb\u30fc\u30b8<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong><span class=\"swl-marker mark_yellow\">\u554f\u3044\u5408\u308f\u305b\uff08Query\uff09\u7cfb<\/span><\/strong>\n<ul class=\"wp-block-list\">\n<li>\u901a\u4fe1\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3002<\/li>\n\n\n\n<li>\u4ee3\u8868\u4f8b\uff1a<strong>ping\uff08Echo Request \/ Echo Reply\uff09<\/strong>\u3001<strong>traceroute<\/strong>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><span class=\"swl-marker mark_yellow\">\u30a8\u30e9\u30fc\u901a\u77e5\uff08Error\uff09\u7cfb<\/span><\/strong>\n<ul class=\"wp-block-list\">\n<li>\u901a\u4fe1\u3067\u304d\u306a\u304b\u3063\u305f\u3068\u304d\u306e\u7406\u7531\u3092\u9001\u4fe1\u5143\u306b\u77e5\u3089\u305b\u308b\u3002<\/li>\n\n\n\n<li>\u4ee3\u8868\u4f8b\uff1a\u300c\u5b9b\u5148\u306b\u5230\u9054\u3067\u304d\u306a\u3044\u300d\u300cTTL\u8d85\u904e\u300d\u306a\u3069\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3b\u306aICMP\u30e1\u30c3\u30bb\u30fc\u30b8\u4f8b<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30bf\u30a4\u30d7<\/th><th>\u30b3\u30fc\u30c9<\/th><th>\u5185\u5bb9<\/th><th>\u610f\u5473<\/th><th>\u7a2e\u985e<\/th><\/tr><\/thead><tbody><tr><td>0<\/td><td>0<\/td><td>Echo Reply<\/td><td>ping\u306e\u5fdc\u7b54<\/td><td>Query<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>Net Unreachable<\/td><td>\u5b9b\u5148\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5230\u9054\u3067\u304d\u306a\u3044<\/td><td>Error<\/td><\/tr><tr><td>3<\/td><td>1<\/td><td>Host Unreachable<\/td><td>\u5b9b\u5148\u30db\u30b9\u30c8\u306b\u5230\u9054\u3067\u304d\u306a\u3044<\/td><td>Error<\/td><\/tr><tr><td>5<\/td><td>0<\/td><td>Redirect<\/td><td>\u6700\u9069\u306a\u7d4c\u8def\u3092\u901a\u77e5<\/td><td>Error<\/td><\/tr><tr><td>8<\/td><td>0<\/td><td>Echo Request<\/td><td>ping\u306e\u8981\u6c42<\/td><td>Query<\/td><\/tr><tr><td>11<\/td><td>0<\/td><td>Time Exceeded<\/td><td>TTL\u304c0\u306b\u306a\u3063\u305f\uff08\u30d1\u30b1\u30c3\u30c8\u7834\u68c4\uff09<\/td><td>Error<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u521d\u5fc3\u8005\u5411\u3051\u307e\u3068\u3081<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ICMP = \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u90f5\u4fbf\u5c40\u304b\u3089\u306e\u901a\u77e5\u8868<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u300c\u3053\u306e\u4f4f\u6240\uff08IP\uff09\u306f\u5c4a\u304d\u307e\u305b\u3093\u300d\uff1d Destination Unreachable<\/li>\n\n\n\n<li>\u300c\u914d\u9054\u30eb\u30fc\u30c8\u3092\u5909\u3048\u3066\u304f\u3060\u3055\u3044\u300d\uff1d Redirect<\/li>\n\n\n\n<li>\u300c\u751f\u5b58\u6642\u9593\u5207\u308c\uff08TTL\u8d85\u904e\uff09\u300d\uff1d Time Exceeded<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>ping<\/strong> \u306f\u300c\u624b\u7d19\u3092\u9001\u3063\u3066\u8fd4\u4e8b\u304c\u6765\u308b\u304b\u300d\u3092\u78ba\u8a8d\u3059\u308b\u4ed5\u7d44\u307f\u3002<\/li>\n\n\n\n<li><strong>traceroute<\/strong> \u306f\u300c\u914d\u9054\u7d4c\u8def\u3092\u8abf\u3079\u308b\u300d\u4ed5\u7d44\u307f\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u25c6\u307e\u3068\u3081\u30b9\u30e9\u30a4\u30c9<\/h2>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/02\/ICMP.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"ICMP\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-49c4600c-214e-4185-8bd2-f20d8ee3a948\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/02\/ICMP.pdf\">ICMP<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>ICMP\u3068\u306f \u300cping\uff08\u30d4\u30f3\u30b0\uff09\u300d\u3084\u300ctraceroute\uff08\u30c8\u30ec\u30fc\u30b9\u30eb\u30fc\u30c8\uff09\u300d\u3067\u3088\u304f\u767b\u5834\u3059\u308b\u306e\u304cICMP\u3002 ICMP\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8 ICMP\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u4ee5\u4e0b\u306e4\u3064\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002 \u30d5\u30a3\u30fc\u30eb\u30c9 \u82f1\u8a9e\u8868\u8a18 \u30d3\u30c3\u30c8\u6570 \u8aac\u660e  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-118","post","type-post","status-publish","format-standard","hentry","category-network"],"_links":{"self":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=118"}],"version-history":[{"count":6,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/118\/revisions"}],"predecessor-version":[{"id":592,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/118\/revisions\/592"}],"wp:attachment":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}