比如:
# nslookup www.bjlx.org.cn
Server: 192.168.2.7
Address: 192.168.2.7#53
Non-authoritative answer:
Name: www.bjlx.org.cn
Address: 192.3.122.85
# nslookup www.bjlx.org.cn 192.168.2.6
Server: 192.168.2.6
Address: 192.168.2.6#53
Name: www.bjlx.org.cn
Address: 192.3.122.85
上面的结果中,来自192.168.2.7的解析结果是Non-authoritative answer, 原因是,192.168.2.7的解析结果, 是通过别的上游dns获取的,所以是Non-authoritative answer,
而192.168.2.6对www.bjlx.org.cn的解析, 是直接来自本机的bind设置文件, 所以没有这个提示