Suggested Answer:B🗳️
DNSSEC does not require any additional DNS queries to be performed. The DNSSEC integrity checks and validations are all performed as part of the single DNS lookup resolution.
When DNSSEC integrity checks are added, an additional two DNS queries are needed. DNSSEC (Domain Name System Security Extensions) is a set of security extensions to the Domain Name System (DNS) that provide authentication and integrity for DNS data. When DNSSEC is used, additional DNS queries are needed in order to verify the authenticity and integrity of DNS records. This involves querying additional DNS resource records, such as the DNSKEY and DS records, which are used to verify the digital signatures on DNS data. As a result, two additional DNS queries are typically needed when DNSSEC is used, in addition to the initial query for the DNS data itself.
correct me if i'm wrong but with DNSsec the recursive DNS has to query public keys to verify signature, right ?
So, zero from a client point of view (only one query to his recursive DNS server) but many if count all needed queries
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