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\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u57fa\u76e4\u3068\u306a\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u7fa4\u3067\u3042\u308a\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u4f1d\u9001\uff08TCP\uff09\u3068\u7d4c\u8def\u9078\u629e\uff08IP\uff09\u3092\u62c5\u3046\u3002  HTTP (HyperText Transfer Protocol): Web\u30d6\u30e9\u30a6\u30b6\u3068Web\u30b5\u30fc\u30d0\u30fc\u9593\u3067Web\u30da\u30fc\u30b8\u306a\u3069\u306e\u30c7\u30fc\u30bf\u3092\u3084\u308a\u53d6\u308a\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308b\u3002  SMTP (Simple Mail Transfer Protocol): \u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u7528\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308b\u3002  \u30d7\u30ed\u30c8\u30b3\u30eb\u30b9\u30bf\u30c3\u30af 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