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名前解決(DNS)

Posted at

勘違いしていたので備忘録
 

通信順序

下記の図の①の後にそのまま③でルーティングしてくれると思っていたが、②でIPを受け取ってからそのIPを使用してクライアントからリクエスト③を行う。
66A5E3AB-C778-491D-A094-440BBBD353B4.png

 

名前解決

名前解決の際に自前で用意したDNS(LAN内であればhostファイルでも可)で名前解決できない場合、ルートサーバへ問い合わせる。以降下位ドメインへの繰り返し問い合わせを実施(上記の例であればcomの宛先が返却される)。

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