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Most importantly, it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.An often used analogy to explain the Domain Name System is that it serves as the "phone book" for the Internet by translating human-friendly computer hostnames into IP addresses. The first record of each database file is the SOA record (Start of Authority).
Each Internet host has a unique IP address so that other machines can connect to it.This site has been blocked by order of the government of Russia.You can read more about Russia’s internet censorship law here.a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network.It associates various information with domain names assigned to each of the participants.Specifies that the domain name is an alias of another.
When a DNS resolver encounters a CNAME record while looking for a regular resource record, it will restart the query using the canonical name instead of the original name.
SPF is an e-mail validation system designed to prevent e-mail spam by addressing a common vulnerability, source address spoofing.
SPF allows administrators to specify which hosts are allowed to send e-mail from a given domain by creating a specific DNS SPF record in the public DNS.
Mail exchangers then use the DNS to check that mail from a given domain is being sent by a host sanctioned by that domain's.
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