Networking 什么是'；没有这样的名字'；在DNS中是什么意思？

所以我目前正在使用Wireshark调查DNS流量。在命令提示下，我正在运行查询

nslookup

，以查找域。在wireshark，我得到了以下回应：

Flags: 0x8183 Standard query response, No such name
    1... .... .... .... = Response: Message is a response
    .000 0... .... .... = Opcode: Standard query (0)
    .... .0.. .... .... = Authoritative: Server is not an authority for domain
    .... ..0. .... .... = Truncated: Message is not truncated
    .... ...1 .... .... = Recursion desired: Do query recursively
    .... .... 1... .... = Recursion available: Server can do recursive queries
    .... .... .0.. .... = Z: reserved (0)
    .... .... ..0. .... = Answer authenticated: Answer/authority portion was not authenticated by the server
    .... .... ...0 .... = Non-authenticated data: Unacceptable
    .... .... .... 0011 = Reply code: No such name (3)

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“没有这样的名称”到底是什么意思？为什么要显示它？

查看RFC 1035第4.1.1节中对NXDOMIN的描述：

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太好了。非常感谢您可以使用wireshark中的dns.flags.rcode访问此属性

            3               Name Error - Meaningful only for
                            responses from an authoritative name
                            server, this code signifies that the
                            domain name referenced in the query does
                            not exist.