{"id":4384,"date":"2025-09-11T00:00:00","date_gmt":"2025-09-11T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/ppp-point-to-point-protocol-explained\/"},"modified":"2026-06-10T01:16:47","modified_gmt":"2026-06-10T01:16:47","slug":"ppp-point-to-point-protocol-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/ppp-point-to-point-protocol-explained","title":{"rendered":"PPP\uff08Point-to-Point Protocol\uff1a\u30dd\u30a4\u30f3\u30c8\u30fb\u30c4\u30fc\u30fb\u30dd\u30a4\u30f3\u30c8\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u3068\u306f\u4f55\u304b\u3001\u304a\u3088\u3073\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u304a\u3051\u308b\u52d5\u4f5c\u539f\u7406"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1.webp\" alt=\"What Is PPP (Point-to-Point Protocol)\uff1f\" class=\"wp-image-4381\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 PPP\uff08Point-to-Point Protocol\uff1a\u30dd\u30a4\u30f3\u30c8\u30fb\u30c4\u30fc\u30fb\u30dd\u30a4\u30f3\u30c8\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u306e\u89e3\u8aac<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PPP\uff08Point-to-Point Protocol\uff1a\u30dd\u30a4\u30f3\u30c8\u30fb\u30c4\u30fc\u30fb\u30dd\u30a4\u30f3\u30c8\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff09<\/strong> \u306f\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b<br> <strong>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb<\/strong> designed to enable direct communication between two network nodes. Standardized by the IETF, PPP provides a reliable method to transport multiple types of network layer packets\u2014such as IPv4, IPv6, and legacy protocols\u2014over point-to-point links, including serial cables, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/knowledge-center\/fiber-optic-cable-what-it-is-and-how-it-works-explained\/\">\u5149\u30d5\u30a1\u30a4\u30d0\u30fc<\/a>, \u3001DSL\u3001\u307e\u305f\u306f\u5c02\u7528\u306e\u5c02\u7dda\u63a5\u7d9a\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30de\u30eb\u30c1\u30a2\u30af\u30bb\u30b9\u74b0\u5883\u3067\u52d5\u4f5c\u3059\u308bEthernet\u3068\u306f\u7570\u306a\u308a\u3001PPP\u306f <strong>\u30ce\u30fc\u30c9\u9593\u306e\u76f4\u63a5\u901a\u4fe1<\/strong>, \u306b\u6700\u9069\u5316\u3055\u308c\u3066\u304a\u308a\u3001 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/knowledge-center\/what-is-a-wide-area-network\/\">WAN\uff08\u5e83\u57df\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09 <\/a>\u304a\u3088\u3073\u521d\u671f\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u6280\u8853\u306e\u57fa\u76e4\u3068\u306a\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 PPP\u306e\u4e3b\u8981\u306a\u6a5f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPP\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304a\u3088\u3073\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30baWAN\u306b\u304a\u3044\u3066\u597d\u307e\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u306a\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e3\u3064\u306e\u5fc5\u9808\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u30d1\u30b1\u30c3\u30c8\u306e\u30ab\u30d7\u30bb\u30eb\u5316<\/strong><\/p><ul><li><p>PPP\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7d71\u4e00\u3055\u308c\u305f\u30d5\u30ec\u30fc\u30e0\u5f62\u5f0f\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u307e\u3059\u3002.<\/p><\/li><li><p>\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u7a2e\u30b7\u30b9\u30c6\u30e0\u9593\u306e\u4e92\u63db\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u3001\u8907\u6570\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u540c\u6642\u306b\u30b5\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li><li><p><strong>\u30ea\u30f3\u30af\u306e\u78ba\u7acb\u3068\u69cb\u6210<\/strong><\/p><ul><li><p>PPP\u306f\u3001 <strong>\u30ea\u30f3\u30af\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb\uff08LCP\uff1aLink Control Protocol\uff09<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u30012\u3064\u306e\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u30ea\u30f3\u30af\u3092\u78ba\u7acb\u3001\u69cb\u6210\u3001\u304a\u3088\u3073\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002.<\/p><\/li><li><p>\u6700\u5927\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u3001\u5727\u7e2e\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u30a8\u30e9\u30fc\u691c\u51fa\u65b9\u5f0f\u306a\u3069\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306f\u3001\u52d5\u7684\u306b\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li><li><p><strong>\u8a8d\u8a3c<\/strong><\/p><ul><li><p>PPP\u306f\u3001 <strong>PAP\uff08Password Authentication Protocol\uff1a\u30d1\u30b9\u30ef\u30fc\u30c9\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\uff09<\/strong> \u304a\u3088\u3073 <strong>CHAP\uff08Challenge Handshake Authentication Protocol\uff1a\u30c1\u30e3\u30ec\u30f3\u30b8\u30fb\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u8a8d\u8a3c\u30d7\u30ed\u30c8\u30b3\u30eb\uff09<\/strong>.<\/p><\/li><li><p>\u3092\u7528\u3044\u305f\u4efb\u610f\u306e\u8a8d\u8a3c\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u8a31\u53ef\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u307e\u305f\u306f\u30c7\u30d0\u30a4\u30b9\u306e\u307f\u304c\u63a5\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li><li><p><strong>\u8907\u6570\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30b5\u30dd\u30fc\u30c8<\/strong><\/p><ul><li><p>PPP\u306f\u3001 <strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb\uff08NCP\uff1aNetwork Control Protocols\uff09<\/strong> \uff08\u4f8b\uff1aIPCP\uff08IPv4\u7528\uff09\u3001IPV6CP\uff08IPv6\u7528\uff09\u306a\u3069\uff09\u3092\u901a\u3058\u3066\u3001\u3055\u307e\u3056\u307e\u306a\u4e0a\u4f4d\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1589\" height=\"656\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af.png\" alt=\"PPP Process\" class=\"wp-image-4382\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af.png 1589w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-300x124.png 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-1024x423.png 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-768x317.png 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-1536x634.png 1536w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-18x7.png 18w\" sizes=\"(max-width: 1589px) 100vw, 1589px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 PPP\u30d5\u30ec\u30fc\u30e0\u69cb\u9020<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPP\u30d5\u30ec\u30fc\u30e0\u306fHDLC\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u57fa\u3065\u304d\u3001\u4ee5\u4e0b\u306e\u8981\u7d20\u3092\u542b\u307f\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u30d5\u30e9\u30b0\uff080x7E\uff09\uff1a<\/strong> \u30d5\u30ec\u30fc\u30e0\u306e\u958b\u59cb\u304a\u3088\u3073\u7d42\u4e86\u3092\u793a\u3057\u307e\u3059\u3002.<\/p><\/li><li><p><strong>\u30a2\u30c9\u30ec\u30b9\uff080xFF\uff09\uff1a<\/strong> PPP\u3067\u306f\u56fa\u5b9a\u3055\u308c\u308b\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002.<\/p><\/li><li><p><strong>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\uff080x03\uff09\uff1a<\/strong> \u756a\u53f7\u306a\u3057\u60c5\u5831\uff08Unnumbered Information\uff09\u3092\u793a\u3057\u307e\u3059\u3002.<\/p><\/li><li><p><strong>\u30d7\u30ed\u30c8\u30b3\u30eb\uff1a<\/strong> \u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\uff08\u4f8b\uff1aIPv4\u3001IPv6\uff09\u3092\u8b58\u5225\u3057\u307e\u3059\u3002.<\/p><\/li><li><p><strong>\u30da\u30a4\u30ed\u30fc\u30c9\uff1a<\/strong> \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u3067\u3059\u3002.<\/p><\/li><li><p><strong>FCS\uff08Frame Check Sequence\uff1a\u30d5\u30ec\u30fc\u30e0\u30c1\u30a7\u30c3\u30af\u30b7\u30fc\u30b1\u30f3\u30b9\uff09\uff1a<\/strong> CRC\u3092\u7528\u3044\u305f\u30a8\u30e9\u30fc\u691c\u51fa\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u69cb\u9020\u306b\u3088\u308a\u3001\u30ce\u30a4\u30ba\u306e\u591a\u3044\u4f1d\u9001\u5a92\u4f53\u4e0a\u3067\u3082\u5805\u7262\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u304a\u3088\u3073\u30a8\u30e9\u30fc\u691c\u51fa\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 PPP\u306e\u5fdc\u7528\u5206\u91ce<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPP\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u30b7\u30ca\u30ea\u30aa\u3067\u9069\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>WAN\u63a5\u7d9a<\/strong><\/p><ul><li><p><span class=\"qc-p1-tag\">PPP\u306f\u3001\u30dd\u30a4\u30f3\u30c8\u30fb\u30c4\u30fc\u30fb\u30dd\u30a4\u30f3\u30c8\u5c02\u7dda\u304a\u3088\u3073 <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/what-is-packet-over-sonet-sdh-pos\/\"><strong>\u30d1\u30b1\u30c3\u30c8\u30fb\u30aa\u30fc\u30d0\u30fc\u30fbSONET\/SDH\uff08POS\uff09<\/strong><\/a><span class=\"qc-p1-tag\"> \u30eb\u30fc\u30bf\u30fc\u9593\u306e\u63a5\u7d9a\u3067\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/span><\/p><\/li><\/ul><\/li><li><p><strong>\u30d6\u30ed\u30fc\u30c9\u30d0\u30f3\u30c9\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a<\/strong><\/p><ul><li><p>\u6b21\u306e\u3088\u3046\u306a\u6280\u8853\u3001 <strong>PPPoE\uff08PPP over Ethernet\uff1a\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u4e0a\u306ePPP\uff09<\/strong> \u304a\u3088\u3073 <strong>PPPoA\uff08PPP over ATM\uff1aATM\u4e0a\u306ePPP\uff09<\/strong> \u306f\u3001DSL\u30d6\u30ed\u30fc\u30c9\u30d0\u30f3\u30c9\u5c55\u958b\u306e\u57fa\u76e4\u3068\u306a\u308a\u3001ISP\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u8a8d\u8a3c\u304a\u3088\u3073\u7ba1\u7406\u3092\u884c\u3046\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3057\u305f\u3002.<\/p><\/li><\/ul><\/li><li><p><strong>\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VPN\uff09<\/strong><\/p><ul><li><p>\u521d\u671f\u306eVPN\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001PPP\u3092\u30d7\u30ed\u30c8\u30b3\u30eb\u30ab\u30d7\u30bb\u30eb\u5316\u304a\u3088\u3073\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u306b\u6d3b\u7528\u3057\u3001PPTP\u304a\u3088\u3073\u95a2\u9023\u3059\u308b\u30c8\u30f3\u30cd\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u57fa\u790e\u3092\u7bc9\u304d\u307e\u3057\u305f\u3002.<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 PPP\u304c\u4eca\u306a\u304a\u91cd\u8981\u3067\u3042\u308b\u7406\u7531<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ethernet\u3084 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/what-is-mpls-multiprotocol-label-switching\/\">MPLS\uff09<\/a> \u4ed6\u306e\u73fe\u4ee3\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6280\u8853\u304c\u4e3b\u6d41\u3068\u306a\u3063\u305f\u73fe\u5728\u3067\u3082\u3001PPP\u306f <strong>\u30ec\u30ac\u30b7\u30fcWAN\u30b7\u30b9\u30c6\u30e0<\/strong> \u304a\u3088\u3073 <strong>\u30d7\u30ed\u30c8\u30b3\u30eb\u30ab\u30d7\u30bb\u30eb\u5316\u624b\u6cd5<\/strong>. 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