7 terms
Authoritative DNS is the server role that holds the original records of a DNS zone and gives definitive answers about names in that zone.
DNS, the Domain Name System, is the distributed, hierarchical directory of the Internet that translates domain names into IP addresses and other records.
DNS propagation is the delay before a changed DNS record is seen everywhere, as resolver caches expire according to TTL values and zones sync.
A DNS resolver is the client-side component of DNS that turns domain names into IP addresses by querying name servers and caching the answers.
A DNS zone is a delegated part of the domain name space managed as one unit, with its own records, authoritative servers and administrator.
DNSSEC is a set of DNS security extensions that adds digital signatures to DNS records so resolvers can verify that answers are authentic and unaltered.
Recursive DNS is the resolution service that answers a client's DNS query completely by querying root, TLD and authoritative servers and caching results.