描述下什麼是域名解析？簡述它的基本過程

失敗原因：

{
  "error": {
    "message": " (request id: 202411210354505866909563KTs2j6c)",
    "type": "upstream_error",
    "param": "404",
    "code": "bad_response_status_code"
  }
}