{"id":476237,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:18","modified_gmt":"2023-09-05T11:12:18","slug":"class-a-ip-address","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/class-a-ip-address\/","title":{"rendered":"\u30af\u30e9\u30b9A IP\u30a2\u30c9\u30ec\u30b9"},"content":{"rendered":"<p>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u57fa\u76e4\u306e\u91cd\u8981\u306a\u5074\u9762\u3067\u3042\u308a\u3001\u30b0\u30ed\u30fc\u30d0\u30eb IP \u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u5185\u306e\u5e45\u5e83\u3044 IP \u30a2\u30c9\u30ec\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u4ed6\u306e\u30af\u30e9\u30b9\u3068\u306f\u7570\u306a\u308b\u72ec\u81ea\u306e\u7279\u6027\u3092\u5099\u3048\u3066\u3044\u308b\u305f\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u91cd\u8981\u306a\u90e8\u5206\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306e\u8d77\u6e90\u3068\u6700\u521d\u306e\u8a00\u53ca<\/h2>\n<p>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306e\u6982\u5ff5\u306f\u3001\u4ed6\u306e IP \u30a2\u30c9\u30ec\u30b9 \u30af\u30e9\u30b9\u3068\u3068\u3082\u306b\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u521d\u671f\u306e\u767a\u5c55\u306b\u7aef\u3092\u767a\u3057\u3066\u3044\u307e\u3059\u3002IP \u30a2\u30c9\u30ec\u30b9\u306e\u8a2d\u8a08\u306f\u3001TCP\/IP \u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb \u30b9\u30a4\u30fc\u30c8\u306e\u4e00\u90e8\u3067\u3042\u308b RFC 791 \u306e\u767a\u884c\u306b\u3088\u308a\u30011981 \u5e74 9 \u6708\u306b\u516c\u5f0f\u306b\u6587\u66f8\u5316\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb \u30b9\u30a4\u30fc\u30c8\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30c7\u30fc\u30bf\u901a\u4fe1\u306e\u57fa\u76e4\u3068\u306a\u308a\u3001\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306f\u3053\u306e\u57fa\u790e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3057\u305f\u3002<\/p>\n<h2>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9: \u8a73\u7d30<\/h2>\n<p>IP \u30a2\u30c9\u30ec\u30b9\u306b\u306f\u3001\u30d4\u30ea\u30aa\u30c9\u3067\u533a\u5207\u3089\u308c\u305f 4 \u3064\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u5404\u30aa\u30af\u30c6\u30c3\u30c8\u306f 8 \u30d3\u30c3\u30c8\u3067\u69cb\u6210\u3055\u308c\u30010 \u304b\u3089 255 \u307e\u3067\u306e\u5024\u3092\u4fdd\u6301\u3067\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9 A \u306f\u3001\u5e38\u306b 0 \u306b\u8a2d\u5b9a\u3055\u308c\u308b\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306e\u5148\u982d\u30d3\u30c3\u30c8\u306b\u3088\u3063\u3066\u6307\u5b9a\u3055\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30af\u30e9\u30b9 A \u306e\u7bc4\u56f2\u306f 0.0.0.0 \u304b\u3089 127.255.255.255 \u3067\u3001\u7d04 128 \u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af (0.0.0.0 \u3092\u9664\u304f 127) \u3068\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3042\u305f\u308a\u7d04 1,670 \u4e07\u306e\u30db\u30b9\u30c8\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9A IP\u30a2\u30c9\u30ec\u30b9\u306e\u5185\u90e8\u69cb\u9020\u3068\u52d5\u4f5c<\/h2>\n<p>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u3067\u306f\u3001\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u5206\u3067\u3001\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6b8b\u308a\u306e 3 \u3064\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306f\u30db\u30b9\u30c8\u90e8\u5206\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u7279\u5b9a\u306e\u30ce\u30fc\u30c9\u307e\u305f\u306f\u30db\u30b9\u30c8\u3092\u8b58\u5225\u3057\u307e\u3059\u3002\u3053\u306e\u69cb\u9020\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u3001NHHH \u3068\u3057\u3066\u8868\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u3001\u300cN\u300d\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001\u300cH\u300d\u306f\u30db\u30b9\u30c8\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9A IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e3b\u306a\u7279\u5fb4<\/h2>\n<ul>\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306b\u591a\u6570\u306e\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9 (\u7d04 1,670 \u4e07) \u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/li>\n<li>\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8b58\u5225\u7528\u306b\u4e88\u7d04\u3055\u308c\u3066\u304a\u308a\u3001\u5c11\u6570\u306e\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306e\u6700\u521d\u306e\u30d3\u30c3\u30c8\u306f\u5e38\u306b 0 \u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306e\u7a2e\u985e<\/h2>\n<p>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306b\u306f\u3001\u30d1\u30d6\u30ea\u30c3\u30af\u3068\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306e 2 \u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30d6\u30ea\u30c3\u30af \u30a2\u30c9\u30ec\u30b9\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u4e00\u610f\u3067\u3042\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7d4c\u7531\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9 A \u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 \u30a2\u30c9\u30ec\u30b9\u306f 10.0.0.0 \uff5e 10.255.255.255 \u3067\u3001\u4e3b\u306b\u30ed\u30fc\u30ab\u30eb \u30a8\u30ea\u30a2 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af (LAN) \u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306e\u5229\u7528\u3001\u554f\u984c\u3001\u304a\u3088\u3073\u89e3\u6c7a\u7b56<\/h2>\n<p>\u30af\u30e9\u30b9 A \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306b\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u30db\u30b9\u30c8\u306e\u6570\u304c\u975e\u5e38\u306b\u591a\u3044\u305f\u3081\u3001\u901a\u5e38\u306f\u5927\u898f\u6a21\u306a\u7d44\u7e54\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u307b\u3068\u3093\u3069\u306e\u7d44\u7e54\u3067\u306f\u305d\u308c\u307b\u3069\u591a\u304f\u306e\u30db\u30b9\u30c8\u306f\u5fc5\u8981\u306a\u3044\u305f\u3081\u3001\u30db\u30b9\u30c8 \u30b9\u30da\u30fc\u30b9\u304c\u81a8\u5927\u306b\u306a\u308b\u3068\u7121\u99c4\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7121\u99c4\u304c\u3001IP \u30a2\u30c9\u30ec\u30b9\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u30ec\u30b9 \u30c9\u30e1\u30a4\u30f3\u9593\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 (CIDR) \u306e\u958b\u767a\u306b\u3064\u306a\u304c\u3063\u305f\u8981\u56e0\u306e 1 \u3064\u3067\u3057\u305f\u3002<\/p>\n<h2>\u4ed6\u306e\u30af\u30e9\u30b9\u3068\u306e\u6bd4\u8f03<\/h2>\n<table>\n<thead>\n<tr>\n<th>IP\u30af\u30e9\u30b9<\/th>\n<th>\u5148\u982d\u30d3\u30c3\u30c8<\/th>\n<th>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08N\uff09\u3068\u30db\u30b9\u30c8\uff08H\uff09\u90e8\u5206\u306e\u30b5\u30a4\u30ba<\/th>\n<th>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6570<\/th>\n<th>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306e\u30a2\u30c9\u30ec\u30b9\u6570<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u3042<\/td>\n<td>0<\/td>\n<td>\u3093\u30fc<\/td>\n<td>128\uff08\u4f7f\u7528\u53ef\u80fd127\uff09<\/td>\n<td>16,777,216<\/td>\n<\/tr>\n<tr>\n<td>B<\/td>\n<td>10<\/td>\n<td>\u3093\u3093\u3093<\/td>\n<td>16,384<\/td>\n<td>65,536<\/td>\n<\/tr>\n<tr>\n<td>C<\/td>\n<td>110<\/td>\n<td>\u3093\u3093\u3093<\/td>\n<td>2,097,152<\/td>\n<td>256<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u5c06\u6765\u306e\u5c55\u671b\u3068\u6280\u8853<\/h2>\n<p>IP \u30a2\u30c9\u30ec\u30b9\u306e\u9700\u8981\u304c\u9ad8\u307e\u308b\u306b\u3064\u308c\u3066\u300132 \u30d3\u30c3\u30c8\u3067\u306f\u306a\u304f 128 \u30d3\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b IPv6 \u304c\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u4f7f\u7528\u53ef\u80fd\u306a IP \u30a2\u30c9\u30ec\u30b9\u306e\u6570\u304c\u5927\u5e45\u306b\u5897\u52a0\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u3088\u3046\u306a\u958b\u767a\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u7279\u306b\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u3067\u5f15\u304d\u7d9a\u304d\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u3068\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc<\/h2>\n<p>\u30af\u30e9\u30b9 A IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3067\u5229\u7528\u3057\u3066\u3001\u81a8\u5927\u306a\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3067\u304d\u307e\u3059\u3002\u30db\u30b9\u30c8 \u30b9\u30da\u30fc\u30b9\u304c\u5927\u304d\u3044\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u30a2\u30c9\u30ec\u30b9\u306f OneProxy \u306e\u3088\u3046\u306a\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<ul>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc791\" target=\"_new\" rel=\"noopener nofollow\">RFC 791 \u2013 \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/ip\/routing-information-protocol-rip\/13788-3.html\" target=\"_new\" rel=\"noopener nofollow\">IP \u30a2\u30c9\u30ec\u30b9 \u30af\u30e9\u30b9\u306e\u6982\u8981<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc4632\" target=\"_new\" rel=\"noopener nofollow\">\u30af\u30e9\u30b9\u30ec\u30b9\u30c9\u30e1\u30a4\u30f3\u9593\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 (CIDR)<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/products\/collateral\/ios-nx-os-software\/enterprise-ipv6-solution\/white_paper_c11-676278.html\" target=\"_new\" rel=\"noopener nofollow\">IPv6 \u30a2\u30c9\u30ec\u30b9\u6307\u5b9a<\/a><\/li>\n<\/ul>","protected":false},"featured_media":476238,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476237","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Class A IP Address: An In-depth Overview<\/mark>","faq_items":[{"question":"What is a Class A IP address?","answer":"<p>A Class A IP address is a type of IP address that forms a crucial part of the internet's foundation. It ranges from 0.0.0.0 to 127.255.255.255 and provides approximately 128 networks (127 usable) with around 16.7 million hosts per network.<\/p>"},{"question":"When was the concept of Class A IP address first introduced?","answer":"<p>The concept of Class A IP addresses, along with other classes of IP addresses, was officially documented in September 1981 with the publication of RFC 791, a part of the Internet Protocol Suite known as TCP\/IP.<\/p>"},{"question":"How is a Class A IP address structured?","answer":"<p>In a Class A IP address, the first octet identifies the network, and the remaining three octets identify a specific host within that network. This structure is typically represented as N.H.H.H, where 'N' stands for Network, and 'H' stands for Host.<\/p>"},{"question":"What are the key features of Class A IP addresses?","answer":"<p>Key features of Class A IP addresses include their large host space, offering approximately 16.7 million hosts per network. Also, the first bit of the first octet in a Class A IP address is always set to 0, which helps identify it as a Class A IP address.<\/p>"},{"question":"What types of Class A IP addresses are there?","answer":"<p>There are two types of Class A IP addresses: Public and Private. Public addresses are globally unique, whereas the private address in Class A is reserved for Local Area Networks (LANs).<\/p>"},{"question":"What problems are associated with Class A IP addresses, and how are they solved?","answer":"<p>One of the main problems associated with Class A IP addresses is the wastage of host space, as most organizations do not require the vast number of hosts provided. This led to the development of Classless Inter-Domain Routing (CIDR) to utilize IP addresses more efficiently.<\/p>"},{"question":"How does a Class A IP address compare to other classes of IP addresses?","answer":"<p>Compared to other classes, Class A IP addresses offer more host addresses per network but support fewer networks. For instance, while Class A supports 128 networks with approximately 16.7 million hosts each, Class B supports 16,384 networks with 65,536 hosts each.<\/p>"},{"question":"How are Class A IP addresses related to proxy servers?","answer":"<p>Class A IP addresses can be used in proxy servers to handle requests from a large number of clients. This makes them particularly useful for large-scale proxy servers like OneProxy.<\/p>"},{"question":"What does the future hold for Class A IP addresses?","answer":"<p>With the development and implementation of IPv6, which significantly expands the number of available IP addresses, the future of Class A IP addresses is likely to be more focused on internal network configurations.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476237\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/476238"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=476237"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}