CompTIA 220-801 Certification Practice Test

Answer - D - The Domain Name System or DNS is a protocol that translates domain names into IP addresses. It translates domain names meaningful to humans into the numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.

Key Takeaway: DNS is a distributed database system that uses the client-server model. The nodes of this database are the name servers. Each domain or sub-domain has one or more authoritative DNS servers that publish information about that domain and the name servers of any domains subordinate to it. The top of the hierarchy is served by the root name servers.