{"id":185,"date":"2022-11-22T14:31:37","date_gmt":"2023-11-14T16:13:54","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%ad%e3%83%b3%e3%82%b0%e7%94%a8%e8%aa%9e%e3%80%81%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%80%81%e3%83%97%e3%83%ad%e3%83%88\/"},"modified":"2025-07-31T21:29:17","modified_gmt":"2025-07-31T12:29:17","slug":"%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%ad%e3%83%b3%e3%82%b0%e7%94%a8%e8%aa%9e%e3%80%81%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%80%81%e3%83%97%e3%83%ad%e3%83%88","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%ad%e3%83%b3%e3%82%b0%e7%94%a8%e8%aa%9e%e3%80%81%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%80%81%e3%83%97%e3%83%ad%e3%83%88\/","title":{"rendered":"\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u7528\u8a9e\u3001\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7d39\u4ecb"},"content":{"rendered":"<h3>\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/h3>\n<p>\u30b5\u30fc\u30d0\u30fc\u3092\u7ba1\u7406\u3059\u308b\u4eba\u306b\u3068\u3063\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306e\u7406\u89e3\u306f\u91cd\u8981\u3067\u3059\u3002\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u30b9\u30e0\u30fc\u30ba\u306b\u904b\u55b6\u3059\u308b\u305f\u3081\u3060\u3051\u3067\u306a\u304f\u3001\u554f\u984c\u306e\u8a3a\u65ad\u306b\u3082\u6d1e\u5bdf\u529b\u3092\u4e0e\u3048\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u4e00\u822c\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306e\u6982\u5ff5\u306b\u3064\u3044\u3066\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u7528\u8a9e\u3001\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u3001\u304a\u3088\u3073\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306e\u7570\u306a\u308b\u968e\u5c64\u306e\u5f79\u5272\u3068\u7279\u6027\u306b\u3064\u3044\u3066\u8b70\u8ad6\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30ac\u30a4\u30c9\u306f\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3082\u306e\u3067\u3059\u304c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u3092\u5229\u7528\u3059\u308b\u7279\u5fb4\u3084\u30b5\u30fc\u30d3\u30b9\u3092\u30b5\u30fc\u30d0\u30fc\u306b\u5b9f\u88c5\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u5f79\u7acb\u3064\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u7528\u8a9e\u96c6<\/h2>\n<p>\u6700\u521d\u306b\u3001\u3053\u306e\u30ac\u30a4\u30c9\u5168\u4f53\u3084\u4ed6\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u95a2\u9023\u3059\u308b\u30ac\u30a4\u30c9\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3088\u304f\u76ee\u306b\u3059\u308b\u4e00\u822c\u7684\u306a\u7528\u8a9e\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u9069\u5207\u306a\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u3053\u308c\u3089\u306e\u7528\u8a9e\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002 (Kore no tekisetsuna sekushon de korera no y\u014dgo ni tsuite kuwashiku setsumei shimasu.)<\/p>\n<ul class=\"post-ul\">\n<li>Connection: In networking, a connection refers to pieces of related information that are transferred through a network. Generally speaking, a connection is established before data transfer (by following the procedures laid out in a protocol) and may be deconstructed at the end of the data transfer.<\/li>\n<li>Packet: A packet is the smallest unit that is intentionally transferred over a network. When communicating over a network, packets are the envelopes that carry your data (in pieces) from one end point to the other.<\/li>\n<\/ul>\n<p>\u30d1\u30b1\u30c3\u30c8\u306b\u306f\u3001\u9001\u4fe1\u5143\u3084\u5b9b\u5148\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30db\u30c3\u30d7\u306a\u3069\u3001\u30d1\u30b1\u30c3\u30c8\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u542b\u3080\u30d8\u30c3\u30c0\u30fc\u90e8\u5206\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30b1\u30c3\u30c8\u306e\u4e3b\u8981\u306a\u90e8\u5206\u306b\u306f\u3001\u5b9f\u969b\u306b\u8ee2\u9001\u3055\u308c\u308b\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u30dc\u30c7\u30a3\u307e\u305f\u306f\u30da\u30a4\u30ed\u30fc\u30c9\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Network Interface: A network interface can refer to any kind of software interface to networking hardware. For instance, if you have two network cards in your computer, you can control and configure each network interface associated with them individually.<\/li>\n<\/ul>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u7269\u7406\u30c7\u30d0\u30a4\u30b9\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3057\u3001\u307e\u305f\u4eee\u60f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u8868\u73fe\u3067\u3042\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306eLinux\u74b0\u5883\u3067\u5229\u7528\u3067\u304d\u308b\u4eee\u60f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e1\u3064\u3067\u3042\u308b\u300c\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u300d\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u540c\u3058\u30de\u30b7\u30f3\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>LAN: LAN stands for \u201clocal area network\u201d. It refers to a network or a portion of a network that is not publicly accessible to the greater internet. A home or office network is an example of a LAN.<\/li>\n<li>WAN: WAN stands for \u201cwide area network\u201d. It means a network that is much more extensive than a LAN. While WAN is the relevant term to use to describe large, dispersed networks in general, it is usually meant to mean the internet, as a whole.<\/li>\n<\/ul>\n<p>\u3082\u3057\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304cWAN\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u3068\u8a00\u308f\u308c\u308c\u3070\u3001\u4e00\u822c\u7684\u306b\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7d4c\u7531\u3067\u5230\u9054\u53ef\u80fd\u3067\u3042\u308b\u3068\u4eee\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Protocol: A protocol is a set of rules and standards that define a language that devices can use to communicate. There are a great number of protocols in use extensively in networking, and they are often implemented in different layers.<\/li>\n<\/ul>\n<p>\u4f4e\u30ec\u30d9\u30eb\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u306fTCP\u3001UDP\u3001IP\u3001ICMP\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u4e0b\u4f4d\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u57fa\u3065\u3044\u3066\u69cb\u7bc9\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u3044\u304f\u3064\u304b\u306e\u4f8b\u3068\u3057\u3066\u306f\u3001\u30a6\u30a7\u30d6\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306eHTTP\u3001SSH\u3001TLS\/SSL\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Port: A port is an address on a single machine that can be tied to a specific piece of software. It is not a physical interface or location, but it allows your server to be able to communicate using more than one application.<\/li>\n<li>Firewall: A firewall is a program that decides whether traffic coming or going from a server should be allowed. A firewall usually works by creating rules for which type of traffic is acceptable on which ports. Generally, firewalls block ports that are not used by a specific application on a server.<\/li>\n<li>NAT: NAT stands for network address translation. It is a way to repackage and send incoming requests to a routing server to the relevant devices or servers on a LAN. This is usually implemented in physical LANs as a way to route requests through one IP address to the necessary backend servers.<\/li>\n<li>VPN: VPN stands for virtual private network. It is a means of connecting separate LANs through the internet, while maintaining privacy. This is used to connect remote systems as if they were on a local network, often for security reasons.<\/li>\n<\/ul>\n<p>\u4ed6\u306b\u3082\u305f\u304f\u3055\u3093\u306e\u8a00\u8449\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u30ea\u30b9\u30c8\u306f\u5b8c\u5168\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4ed6\u306e\u7528\u8a9e\u306f\u8aac\u660e\u3057\u307e\u3059\u3002\u73fe\u6642\u70b9\u3067\u306f\u3001\u3053\u308c\u304b\u3089\u8a71\u3059\u30c8\u30d4\u30c3\u30af\u3092\u3088\u308a\u826f\u304f\u8b70\u8ad6\u3059\u308b\u305f\u3081\u306b\u3001\u3044\u304f\u3064\u304b\u306e\u9ad8\u30ec\u30d9\u30eb\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ec\u30a4\u30e4\u30fc<\/h2>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306f\u3001\u901a\u5e38\u3001\u30db\u30b9\u30c8\u9593\u3067\u6a2a\u65b9\u5411\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u3068\u3057\u3066\u8b70\u8ad6\u3055\u308c\u307e\u3059\u304c\u3001\u4efb\u610f\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u306f\u3001\u5b9f\u88c5\u306f\u5782\u76f4\u65b9\u5411\u306b\u968e\u5c64\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001\u901a\u4fe1\u304c\u6a5f\u80fd\u3059\u308b\u305f\u3081\u306b\u3001\u8907\u6570\u306e\u6280\u8853\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u91cd\u306d\u3089\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u3002\u5404\u4e0a\u4f4d\u306e\u5c64\u306f\u3001\u539f\u59cb\u30c7\u30fc\u30bf\u3092\u5c11\u3057\u62bd\u8c61\u5316\u3057\u307e\u3059\u3002<\/p>\n<p>\u65b0\u3057\u3044\u65b9\u6cd5\u3067\u4e0b\u4f4d\u5c64\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u305d\u308c\u306b\u3088\u3063\u3066\u6642\u9593\u3068\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u8cbb\u3084\u3057\u3066\u30d7\u30ed\u30c8\u30b3\u30eb\u3084\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u51e6\u7406\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308b\u3068\u3044\u3046\u3001\u3053\u306e\u6a5f\u80fd\u3082\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5404\u5c64\u306e\u30b9\u30ad\u30fc\u30e0\u306b\u3064\u3044\u3066\u8a71\u3059\u969b\u306b\u4f7f\u7528\u3059\u308b\u8a00\u8a9e\u306f\u3001\u4f7f\u7528\u3059\u308b\u30e2\u30c7\u30eb\u306b\u3088\u3063\u3066\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5c64\u3092\u8b70\u8ad6\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u30e2\u30c7\u30eb\u306b\u95a2\u4fc2\u306a\u304f\u3001\u30c7\u30fc\u30bf\u306e\u7d4c\u8def\u306f\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u304c1\u3064\u306e\u30de\u30b7\u30f3\u304b\u3089\u9001\u4fe1\u3055\u308c\u308b\u3068\u3001\u305d\u306e\u30c7\u30fc\u30bf\u306f\u30b9\u30bf\u30c3\u30af\u306e\u4e0a\u90e8\u304b\u3089\u4e0b\u65b9\u5411\u306b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u307e\u3059\u3002\u6700\u4e0b\u5c64\u3067\u306f\u3001\u4ed6\u306e\u30de\u30b7\u30f3\u3078\u306e\u5b9f\u969b\u306e\u9001\u4fe1\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u3053\u306e\u6642\u70b9\u3067\u3001\u30c7\u30fc\u30bf\u306f\u4ed6\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u5c64\u3092\u901a\u3063\u3066\u4e0a\u65b9\u5411\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002<\/p>\n<p>\u5404\u5c64\u306f\u96a3\u63a5\u3059\u308b\u5c64\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u306b\u72ec\u81ea\u306e\u300c\u30e9\u30c3\u30d1\u30fc\u300d\u3092\u8ffd\u52a0\u3059\u308b\u80fd\u529b\u3092\u6301\u3063\u3066\u304a\u308a\u3001\u305d\u308c\u306f\u5f8c\u7d9a\u306e\u5c64\u304c\u30c7\u30fc\u30bf\u3092\u5f15\u304d\u7d99\u3050\u969b\u306b\u3069\u306e\u3088\u3046\u306b\u6271\u3046\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3>TCP\/IP\u30e2\u30c7\u30eb<\/h3>\n<p>TCP\/IP \u30e2\u30c7\u30eb\u3001\u3088\u308a\u4e00\u822c\u7684\u306b\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb\u30b9\u30a4\u30fc\u30c8\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u308b\u3082\u306e\u306f\u3001\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u968e\u5c64\u30e2\u30c7\u30eb\u3067\u3059\u3002\u3053\u306e\u30e2\u30c7\u30eb\u306f4\u3064\u306e\u72ec\u7acb\u3057\u305f\u30ec\u30a4\u30e4\u30fc\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Application: In this model, the application layer is responsible for creating and transmitting user data between applications. The applications can be on remote systems, and should appear to operate as if locally to the end user. This communication is said to take place between peers.<\/li>\n<li>Transport: The transport layer is responsible for communication between processes. This level of networking utilizes ports to address different services.<\/li>\n<li>Internet: The internet layer is used to transport data from node to node in a network. This layer is aware of the endpoints of the connections, but is not concerned with the actual connection needed to get from one place to another. IP addresses are defined in this layer as a way of reaching remote systems in an addressable manner.<\/li>\n<li>Link: The link layer implements the actual topology of the local network that allows the internet layer to present an addressable interface. It establishes connections between neighboring nodes to send data.<\/li>\n<\/ul>\n<p>\u3054\u89a7\u306e\u901a\u308a\u3001TCP\/IP\u30e2\u30c7\u30eb\u306f\u62bd\u8c61\u7684\u3067\u6d41\u52d5\u7684\u3067\u3059\u3002\u3053\u308c\u304c\u5b9f\u88c5\u3057\u3084\u3059\u304f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306e\u5c64\u3092\u5206\u985e\u3059\u308b\u969b\u306b\u4e3b\u6d41\u3068\u306a\u308b\u8981\u7d20\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/h2>\n<p>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u901a\u4fe1\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u7269\u7406\u7684\u307e\u305f\u306f\u4eee\u60f3\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u30c7\u30d0\u30a4\u30b9\u3068\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u901a\u5e38\u3001\u30b5\u30fc\u30d0\u30fc\u306b\u306f\u3001\u30a8\u30b5\u30cd\u30c3\u30c8\u307e\u305f\u306f\u30ef\u30a4\u30e4\u30ec\u30b9\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30ab\u30fc\u30c9\u3054\u3068\u306b1\u3064\u306e\u8a2d\u5b9a\u53ef\u80fd\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u305d\u308c\u306f\u300c\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u300d\u307e\u305f\u306flocalhost\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u547c\u3070\u308c\u308b\u4eee\u60f3\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5358\u4e00\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u4e0a\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30d7\u30ed\u30bb\u30b9\u3092\u4ed6\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30d7\u30ed\u30bb\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u591a\u304f\u306e\u30c4\u30fc\u30eb\u3067\u306f\u3001\u300clo\u300d\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u3053\u308c\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3088\u304f\u3001\u7ba1\u7406\u8005\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306b1\u3064\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u8a2d\u5b9a\u3057\u3001LAN\u307e\u305f\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7528\u306b\u5225\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u304c\u6709\u52b9\u306a\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\uff08Silicon Cloud\u306evServers\u3092\u542b\u3080\uff09\u3067\u306f\u3001VPS\u306b\u306f2\u3064\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306b\u3001\u300ceth0\u300d\u3068\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3001\u540c\u6642\u306b\u300ceth1\u300d\u3068\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u306e\u901a\u4fe1\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30c8\u30b3\u30eb<\/h2>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306f\u3001\u8907\u6570\u306e\u7570\u306a\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4e92\u3044\u306b\u9023\u7d50\u3057\u3001\u4e00\u3064\u306e\u30c7\u30fc\u30bf\u3092\u8907\u6570\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u5305\u307e\u308c\u305f\u5f62\u3067\u9001\u4fe1\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f4e\u30ec\u30d9\u30eb\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u5c64\u3067\u5b9f\u88c5\u3055\u308c\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u304b\u3089\u59cb\u3081\u3001\u62bd\u8c61\u5ea6\u306e\u9ad8\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u5411\u3051\u3066\u9032\u3081\u307e\u3059\u3002<\/p>\n<h3>Medium Access Control (MAC) :<br \/>\n\u30e1\u30c7\u30a3\u30a2\u30a2\u30af\u30bb\u30b9\u5236\u5fa1<\/h3>\n<p>\u4e2d\u9593\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u306f\u3001\u7279\u5b9a\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u5404\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u88fd\u9020\u3055\u308c\u308b\u969b\u306b\u56fa\u6709\u306e\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30c7\u30a3\u30a2\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u30a2\u30c9\u30ec\u30b9\uff08MAC\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u3066\u304a\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u4ed6\u306e\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u3068\u533a\u5225\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>MAC\u30a2\u30c9\u30ec\u30b9\u306b\u3088\u3063\u3066\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u304c\u7279\u5b9a\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u540d\u524d\u3092\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u4e2d\u306b\u5909\u66f4\u3057\u3066\u3082\u3001\u305d\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u4e00\u610f\u306e\u5024\u3067\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>MAC\u30a2\u30c9\u30ec\u30c3\u30b7\u30f3\u30b0\u306f\u3001\u4f4e\u30ec\u30d9\u30eb\u30ea\u30f3\u30af\u5c64\u304b\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u3046\u3061\u3001\u5b9a\u671f\u7684\u306b\u5bfe\u8a71\u3059\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3082\u306e\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<h3>IP\u3092\u65e5\u672c\u8a9e\u3067\u540c\u3058\u610f\u5473\u3067\u8a00\u3044\u63db\u3048\u308b\u3068\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059:<\/h3>\n<p>\u30a2\u30a4\u30d4\u30fc<\/p>\n<p>IP\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304c\u52d5\u4f5c\u3059\u308b\u305f\u3081\u306e\u57fa\u672c\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e00\u3064\u3067\u3059\u3002IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u5404\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u4e00\u610f\u3067\u3042\u308a\u3001\u6a5f\u5668\u540c\u58eb\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u76f8\u4e92\u306b\u901a\u4fe1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001TCP\/IP\u30e2\u30c7\u30eb\u306b\u304a\u3044\u3066\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5c64\u3067\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306f\u9023\u643a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5883\u754c\u3092\u8d8a\u3048\u308b\u6642\u306f\u901a\u4fe1\u7d4c\u8def\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u4fe1\u983c\u6027\u306e\u306a\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u3001\u52d5\u7684\u306b\u5909\u66f4\u3067\u304d\u308b\u540c\u3058\u5b9b\u5148\u3078\u306e\u8907\u6570\u306e\u7d4c\u8def\u3092\u60f3\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u5b9f\u88c5\u306b\u306f\u69d8\u3005\u306a\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u73fe\u5728\u6700\u3082\u4e00\u822c\u7684\u306a\u5b9f\u88c5\u306fIPv4\u30a2\u30c9\u30ec\u30b9\u3067\u3001\u30d1\u30bf\u30fc\u30f3\u306f123.123.123.123\u306b\u5f93\u3044\u307e\u3059\u304c\u3001\u5229\u7528\u53ef\u80fd\u306aIPv4\u30a2\u30c9\u30ec\u30b9\u306e\u6570\u304c\u9650\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u3082\u4eba\u6c17\u304c\u9ad8\u307e\u3063\u3066\u304a\u308a\u3001\u30d1\u30bf\u30fc\u30f3\u306f2001:0db8:0000:0000:0000:ff00:0042:8329\u3067\u3059\u3002<\/p>\n<h3>ICMP: Internet Control Message Protocol.<\/h3>\n<p>ICMP\u3068\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5236\u5fa1\u30e1\u30c3\u30bb\u30fc\u30b8\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7565\u3067\u3001\u30c7\u30d0\u30a4\u30b9\u9593\u3067\u5229\u7528\u53ef\u80fd\u72b6\u614b\u3084\u30a8\u30e9\u30fc\u6761\u4ef6\u3092\u793a\u3059\u305f\u3081\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d1\u30b1\u30c3\u30c8\u306f\u3001ping\u3084traceroute\u306a\u3069\u306e\u3055\u307e\u3056\u307e\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a3a\u65ad\u30c4\u30fc\u30eb\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u901a\u5e38\u3001\u7570\u306a\u308b\u7a2e\u985e\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u554f\u984c\u306b\u906d\u9047\u3057\u305f\u969b\u306b\u3001ICMP\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u305d\u308c\u3089\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u6a5f\u69cb\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3>\u4ee5\u4e0b\u306e\u82f1\u6587\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\u4e00\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u5341\u5206\u3067\u3059\u3002<\/h3>\n<p>TCP<\/p>\n<p>TCP\u306f\u3001Transmission Control Protocol\u306e\u7565\u3067\u3042\u308a\u3001TCP\/IP\u30e2\u30c7\u30eb\u306e\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3067\u5b9f\u88c5\u3055\u308c\u3001\u4fe1\u983c\u6027\u306e\u3042\u308b\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>TCP\u306f\u3001\u30c7\u30fc\u30bf\u3092\u30d1\u30b1\u30c3\u30c8\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e00\u3064\u3067\u3059\u3002\u305d\u308c\u306f\u3001\u5229\u7528\u53ef\u80fd\u306a\u4e0b\u4f4d\u5c64\u306e\u65b9\u6cd5\u3092\u4f7f\u3063\u3066\u3001\u3053\u308c\u3089\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u63a5\u7d9a\u306e\u30ea\u30e2\u30fc\u30c8\u30a8\u30f3\u30c9\u306b\u8ee2\u9001\u3057\u307e\u3059\u3002\u4e00\u65b9\u3001TCP\u306f\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3063\u305f\u308a\u3001\u7279\u5b9a\u306e\u90e8\u5206\u306e\u518d\u9001\u3092\u8981\u6c42\u3057\u305f\u308a\u3001\u60c5\u5831\u3092\u4e00\u3064\u306e\u8ad6\u7406\u7684\u306a\u30d4\u30fc\u30b9\u306b\u518d\u7d44\u307f\u7acb\u3066\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u306e\u8ee2\u9001\u524d\u306b3\u30a6\u30a7\u30a4\u30fb\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3068\u547c\u3070\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u7528\u3057\u3066\u63a5\u7d9a\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u901a\u4fe1\u306e\u4e21\u7aef\u304c\u8981\u6c42\u3092\u8a8d\u8b58\u3057\u3001\u30c7\u30fc\u30bf\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u306b\u5408\u610f\u3059\u308b\u624b\u6bb5\u3067\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u304c\u9001\u4fe1\u3055\u308c\u305f\u5f8c\u3001\u540c\u69d8\u306e\uff14\u30a6\u30a7\u30a4\u30fb\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3092\u5229\u7528\u3057\u3066\u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>TCP\u306f\u3001WWW\u3001SSH\u3001\u30e1\u30fc\u30eb\u3092\u542b\u3080\u591a\u304f\u306e\u4eba\u6c17\u306e\u3042\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5229\u7528\u5f62\u614b\u3067\u306e\u9078\u629e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/p>\n<h3>UDP (User Datagram Protocol) &#8211; \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u30d7\u30ed\u30c8\u30b3\u30eb<\/h3>\n<p>UDP\u306f\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7565\u3067\u3001TCP\u3068\u3088\u304f\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u308f\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u307e\u305f\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3067\u3082\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>UDP\u3068TCP\u306e\u6839\u672c\u7684\u306a\u9055\u3044\u306f\u3001UDP\u306f\u4fe1\u983c\u6027\u306e\u306a\u3044\u30c7\u30fc\u30bf\u8ee2\u9001\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002\u305d\u308c\u306f\u3001\u63a5\u7d9a\u306e\u4ed6\u7aef\u3067\u30c7\u30fc\u30bf\u304c\u53d7\u4fe1\u3055\u308c\u305f\u304b\u3092\u691c\u8a3c\u3057\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u60aa\u3044\u3053\u3068\u306e\u3088\u3046\u306b\u805e\u3053\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3057\u3001\u591a\u304f\u306e\u76ee\u7684\u306b\u3068\u3063\u3066\u306f\u60aa\u3044\u3053\u3068\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u4e00\u90e8\u306e\u6a5f\u80fd\u306b\u3068\u3063\u3066\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306e\u53d7\u4fe1\u78ba\u8a8d\u3092\u5f85\u3064\u5fc5\u8981\u3082\u306a\u304f\u3001\u518d\u9001\u4fe1\u3092\u5f37\u5236\u3055\u308c\u308b\u3053\u3068\u3082\u306a\u3044\u305f\u3081\u3001UDP\u306fTCP\u3088\u308a\u3082\u901f\u3044\u3067\u3059\u3002\u30ea\u30e2\u30fc\u30c8\u30db\u30b9\u30c8\u3068\u306e\u63a5\u7d9a\u3092\u78ba\u7acb\u305b\u305a\u3001\u78ba\u8a8d\u306a\u3057\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306b\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u307e\u3059\uff1a\u300c\u30b7\u30f3\u30d7\u30eb\u306a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3067\u3042\u308b\u305f\u3081\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ea\u30bd\u30fc\u30b9\u306e\u7167\u4f1a\u306a\u3069\u306e\u901a\u4fe1\u306b\u4fbf\u5229\u3067\u3059\u3002\u307e\u305f\u3001\u72b6\u614b\u3092\u7dad\u6301\u3057\u306a\u3044\u305f\u3081\u30011\u53f0\u306e\u30de\u30b7\u30f3\u304b\u3089\u591a\u6570\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001VOIP\u3001\u30b2\u30fc\u30e0\u3001\u305d\u306e\u4ed6\u306e\u9045\u5ef6\u3092\u8a31\u5bb9\u3067\u304d\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6700\u9069\u3067\u3059\u3002\u300d<\/p>\n<h3>HTTP\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u308b\u3068\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u4e00\u3064\u3060\u3051\u3067\u3059\u3002<br \/>\n\u300c\u30cf\u30a4\u30d1\u30fc\u30c6\u30ad\u30b9\u30c8\u30c8\u30e9\u30f3\u30b9\u30d5\u30a1\u30fc\u30d7\u30ed\u30c8\u30b3\u30eb\u300d\u3068\u8a00\u3044\u307e\u3059\u3002<\/h3>\n<p>HTTP\u306f\u30cf\u30a4\u30d1\u30fc\u30c6\u30ad\u30b9\u30c8\u8ee2\u9001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7565\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30a6\u30a7\u30d6\u4e0a\u306e\u901a\u4fe1\u306e\u57fa\u76e4\u3068\u306a\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/p>\n<p>HTTP\u306f\u3001\u30ea\u30e2\u30fc\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u3066\u8981\u6c42\u5185\u5bb9\u3092\u4f1d\u3048\u308b\u305f\u3081\u306b\u3044\u304f\u3064\u304b\u306e\u52d5\u8a5e\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001GET\u3001POST\u3001DELETE\u306f\u3001\u8981\u6c42\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3068\u7570\u306a\u308b\u65b9\u6cd5\u3067\u3084\u308a\u53d6\u308a\u3057\u307e\u3059\u3002\u7570\u306a\u308bHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u52d5\u4f5c\u4f8b\u3092\u898b\u308b\u306b\u306f\u3001Express\u3067\u30eb\u30fc\u30c8\u3068HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u65b9\u6cd5\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>DNS (Domain Name System) \u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u308b\u3068\uff1a<\/h3>\n<p>\u300c\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u30b7\u30b9\u30c6\u30e0\u300d<\/p>\n<p>DNS\u3068\u306f\u30c9\u30e1\u30a4\u30f3\u540d\u30b7\u30b9\u30c6\u30e0\u306e\u7565\u79f0\u3067\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30ea\u30bd\u30fc\u30b9\u306b\u5bfe\u3057\u3066\u4eba\u9593\u306b\u5206\u304b\u308a\u3084\u3059\u3044\u540d\u524d\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u540d\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u3065\u3051\u308b\u5f79\u5272\u3092\u679c\u305f\u3057\u3001\u30d6\u30e9\u30a6\u30b6\u3067\u540d\u524d\u3092\u4f7f\u3063\u3066\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>SSH\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u308b\u3068\u300cSecure 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