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Registrants publish a "CAA" Domain Name System (DNS) resource record which compliant certificate authorities check for before issuing digital certificates. CAA was drafted by computer scientists Phillip Hallam-Baker and Rob Stradling in response to increasing concerns about the security of publicly trusted certificate authorities.
A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...
This list of DNS record types is an overview of resource records (RRs) permissible in zone files of the Domain Name System (DNS). It also contains pseudo-RRs. It also contains pseudo-RRs. Resource records
For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed.
For example, if an SRV-aware LDAP client wants to discover an LDAP server for a certain domain, it performs a DNS lookup for _ldap._tcp.example.com (the _tcp means the client requesting a TCP enabled LDAP server). The returned record contains information on the priority, the weight, the port and the target for the service in that domain.
BIND name server; Root name server – top-level name servers providing top level domain name resolution; List of DNS record types – possible types of records stored and queried within DNS; whois; host is a simple utility for performing Domain Name System lookups; nslookup, another utility that can be used to obtain similar information
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