DNS Lookup
A DNS lookup, in a general sense, is the process by which a DNS record is returned from a DNS server.
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The Domain Name System is the hierarchical and decentralized naming system used to identify computers reachable through the Internet or other Internet Protocol networks. The resource records contained in the DNS associate domain names with other forms of information.
A DNS lookup, in a general sense, is the process by which a DNS record is returned from a DNS server. This is like looking up a phone number in a phone book - that is why it is referred to as a "lookup"
With DNSSEC, the DNS resolver checks the signature associated with a record to verify its authenticity, before serving responses to clients. All records must match those stored on an authoritative DNS server. To facilitate digital signature validation, DNSSEC defines several new DNS resource record types.
The Domain Name System Security Extensions (DNSSEC) is a set of specifications that extend the DNS protocol by adding cryptographic authentication for responses received from authoritative DNS servers. Its goal is to defend against techniques that hackers use to direct computers to rogue websites and servers.
