Identify a vital service provided by secondary DNS servers.
A) Secondary DNS servers contain read-write copies of a primary DNS server's data.
B) Secondary DNS servers respond to DNS lookup requests using read-only zone files.
C) Secondary DNS servers improve security by preventing access to primary DNS servers.
D) Secondary DNS servers divert all traffic to primary DNS servers to reduce load.

Question

Quizplus · Accepted Answer

Secondary DNS servers provide redundancy and improve the reliability of DNS by responding to DNS lookup requests using read-only zone files. This ensures that if the primary DNS server becomes unavailable, the secondary DNS server can still provide DNS resolution for the domain. Additionally, secondary DNS servers can help with load balancing, but this is not their primary function. They do not contain read-write copies of the primary DNS server's data, and while they do provide an additional layer of security, this is not their primary purpose.

Identify a Vital Service Provided by Secondary DNS Servers