Kendrick

A secondary DNS server is a DNS server that is used as a backup in case the primary DNS server fails. If the primary DNS server is unavailable, the secondary DNS server can be used to resolve DNS queries. A secondary DNS server can be beneficial if the primary DNS server is overloaded or if it is not properly configured. However, a secondary DNS server should not be used as a primary DNS server because it is less reliable.

Additionally, a secondary DNS server can slow down the DNS resolution process. If you are using a secondary DNS server, be sure to configure it properly and keep it updated.