Identify a Vital Service Provided by Secondary DNS Servers

question 7

Multiple Choice

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.

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Definitions:

Atm

A unit of pressure used to describe the air pressure at sea level, equivalent to 101,325 Pa or about 14.696 psi.

Moles

A unit in chemistry that represents 6.022 x 10^23 particles of a given substance, used to express the amount of a chemical substance.

Temperature

An indication of how hot or cold a substance is, determined by the average kinetic energy of its particles.

Ideal Gas Law

A fundamental equation that relates pressure, volume, temperature, and the amount of gas, represented as PV = nRT.