What Are Authoritative & Recursive name servers
An authoritative name server is a DNS server that stores DNS records (A, CNAME, MX, TXT, etc.) for domain names. These servers will only respond to DNS queries for locally stored DNS zone files. For example, if a DNS server in my network has a stored A record for example.com, then that DNS server is the authoritative server for the example.com domain name.
Recursive Nameserver
A recursive name server is a DNS server that receives DNS queries for informational purposes. These types of DNS servers do not store DNS records. When a DNS query is received, it will search in its cache memory for the host address tied to the IP address from the DNS query. If the recursive name server has the information, then it will return a response to query sender. If it does not have the record, then the DNS query will be sent to other recursive name servers until it reaches an authoritative DNS server that can supply the IP address.
References:
https://www.liquidweb.com/kb/understanding-the-dns-process/
An authoritative name server is a DNS server that stores DNS records (A, CNAME, MX, TXT, etc.) for domain names. These servers will only respond to DNS queries for locally stored DNS zone files. For example, if a DNS server in my network has a stored A record for example.com, then that DNS server is the authoritative server for the example.com domain name.
Recursive Nameserver
A recursive name server is a DNS server that receives DNS queries for informational purposes. These types of DNS servers do not store DNS records. When a DNS query is received, it will search in its cache memory for the host address tied to the IP address from the DNS query. If the recursive name server has the information, then it will return a response to query sender. If it does not have the record, then the DNS query will be sent to other recursive name servers until it reaches an authoritative DNS server that can supply the IP address.
References:
https://www.liquidweb.com/kb/understanding-the-dns-process/
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