What id Secondary DNS zone?
What id Secondary DNS zone?
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What is a secondary DNS server?
Primary DNS servers contain all relevant resource records and handle DNS queries for a domain. By contrast, secondary DNS servers contain zone file copies that are read-only, meaning they cannot be modified. Instead of getting their information from local files, they receive pertinent information from a primary server in a communication process known as a zone transfer.
Zone transfers become more complicated when they are completed between multiple secondary servers. If several secondary servers are in use, one may be designated as a higher-tier secondary server so that it is capable of replicating zone file copies to the remaining pool of secondary servers.