问题
Yesterday I changed my domain's name server from cloudflare to dnspod. And I used dig to test it. But the ANSWER SECTION is always the old name servers.
;; AUTHORITY SECTION:
amazingjxq.com. 21336 IN NS kim.ns.cloudflare.com.
amazingjxq.com. 21336 IN NS brad.ns.cloudflare.com.
Is the ANSWER SECTION stand for name servers? If so why is it not changed?
回答1:
The Authority section indicates the server(s) that are the ultimate authority for answering DNS queries about that domain.
The reason for this section is that you can query any* DNS server(s) to answer a query for you. That server may choose though to answer the query from a cache. However, if you want to ensure you get an authoritative response ("from the horses mouth" so to speak) - you should ask the server(s) in the authority section.
(* = Any server which will accept your query, that is.)
回答2:
Those are cached records coming from the old servers. Cloudflare has 1-day TTLs on the NS records, so that indicates that your resolver cached them about 18 hours ago, and they should go away in 6 hours.
来源：https://stackoverflow.com/questions/16072817/what-does-the-authority-section-mean-in-dig-results