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Training Camp • Cybersecurity Glossary
A recursive resolver fully resolves DNS queries by walking root, TLD, and authoritative servers, caching answers and serving as a key attack target.
Recursive Resolver Definition: A recursive resolver fully resolves DNS queries by walking root, TLD, and authoritative servers, caching answers and serving as a key attack target.
A recursive resolver is a DNS server that accepts a client's query and performs the full resolution process on the client's behalf, querying root, top-level domain, and authoritative name servers until it obtains and returns the final answer. It typically caches responses to improve performance and is a frequent target for attacks such as cache poisoning, DNS spoofing, and DDoS amplification, which DNSSEC and response validation help mitigate.
Recursive Resolver is one of the topics you'll master in the CCNA Boot Camp.
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