Primary vs Secondary DNS

• A DNS server simply a database that stores all the information about domain names and their corresponding IP addresses.

DNS Server Types :

 1. Primary or Master DNS Server

• Master DNS server is nothing but as it's a master name server and holds both zone and records.
• In general, domain names can work with only one name server - the primary dns.
• The information on both servers is identical.

 2. Secondary or Slave DNS Server

• Slave DNS server works as secondary dns server and sync with master dns server for records
• a domain name needs to have at least two name servers assigned in order to be available at any time.
• In case there is a problem with the primary name server, the secondary name server will be able to answer the online request for a particular domain.