基于Windows的DNS服务器支持DNS通知，DNS通知的作用是（ ）。
- A.本地域名服务器发送域名记录
- B.辅助域名服务器及时更新信息
- C.授权域名服务器向管区内发送公告
- D.主域名服务器向域内用户发送被攻击通知
正确答案及解析
正确答案
解析
DNS通知是一种推进机制，辅助域名服务器及时更新信息DNS通知是一种安全机制，只有被通知的辅助服务器才能进行区域数据库复制，防止没有授权的服务器进行非法的区域复制。
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