FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -An NS record (or nameserver record) is a DNS record that contains the name of the authoritative name server within a domain or DNS zone. When a client queries for an IP address, it can find the IP address of their intended destination from an NS record via a DNS lookup.

Detailed explanation-2: -A DNS Name Server (NS) record specifies the domain name of the name server servicing a particular domain. For example, an NS record with a time-to-live (TTL) of 1100 seconds, and for the com domain serviced by the name server a.gtld-servers.net, would be defined as below: com. 1100 IN NS a.gtld-servers.net.

Detailed explanation-3: -The NS records and A records are both used to provide DNS services. The difference between them is that the former define the servers that provide DNS services for a domain name while the A records translate hostnames (such as www, FTP, mail) into IP addresses.

Detailed explanation-4: -Consistency between authoritative name servers All authoritative name servers must serve the same NS record set for the designated domain. All authoritative name servers must serve the same SOA record for the designated domain.