What does non-authoritative answer mean?

Non-authoritative answer simply means the answer is not fetched from the authoritative DNS server for the queried domain name.

What is a non-authoritative server?

Non-authoritative name servers do not contain original source files of domain’s zone. They have a cache file for the domains that is constructed from all the DNS lookups done previously. If a DNS server responded for a DNS query which doesn’t have original file is known as a Non-authoritative answer.

What is the difference between authoritative and non-authoritative server?

Authoritative DNS servers are responsible for the proper mapping of records and to respond to the recursive servers with important information for each website, such as; corresponding IP addresses and other necessary DNS records. Non-authoritative name servers do not contain the original zone files.

What is the meaning of the Non Authoritative Answer?

Non-authoritative answer simply means the answer is not fetched from the authoritative DNS server for the queried domain name. First you have to understand how DNS system works. DNS system can be divided into three tiers.

Where does a non-authoritative answer come from in nslookup?

A non-authoritative answer comes from anywhere else (a nameserver not in the list for the domain you did a lookup on). If I perform a nslookup of google.com, I would get a response from one of my configured nameservers.

Can a non-authoritative server answer an authoritative DNS request?

Thus, non-authoritative servers can answer authoritatively for a given resolution request. However, non-authoritative servers are not authoritative for any domain they do not contain specific zone files for.

How to force an authoritative and non-authoritative synchronization for?

Force Active Directory replication throughout the domain and validate its success on all DCs. Start the DFSR service set as authoritative: You will see Event ID 4114 in the DFSR event log indicating SYSVOL is no longer being replicated. Force Active Directory replication throughout the domain and validate its success on all DCs.