A fully qualified domain name (FQDN), sometimes also referred to as an absolute domain name,[1] is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone.[2] A fully qualified domain name is distinguished by its lack of ambiguity in terms of DNS zone location in the hierarchy of DNS labels: it can be interpreted only in one way.
^April N. Marine; Joyce K. Reynolds; Gary Scott Malkin (March 1994). "Questions About the Domain Name System". Answers to Commonly asked "New Internet User" Questions. IETF. sec. 5. doi:10.17487/RFC1594. RFC 1594. Retrieved 29 April 2013. If you think of the DNS as a tree-structure with each node having its own label, a fully qualified domain name for a specific node would be its label followed by the labels of all the other nodes between it and the root of the tree.
and 24 Related for: Fully qualified domain name information
domainname is usually administered by a domainname registrar who sell its services to the public. A fullyqualifieddomainname (FQDN) is a domain name...
A fullyqualifieddomain address (FQDA) is a string forming an Internet e-mail address. It was defined by the Internet Engineering Task Force in RFC 3801...
Every domainname appears in a zone served by one or more authoritative name servers. The fullyqualifieddomainnames of the authoritative name servers...
domain is a domain used as part of a domain search list. The search list, as well as the local domainname, is used by a resolver to create a fully qualified...
specified in RFC 1035: NAME is the fullyqualifieddomainname of the node in the tree [clarification needed]. On the wire, the name may be shortened using...
considered to be the domainname, wikipedia is actually a sub-domain of the org TLD (top level domain). Any fullyqualifieddomainname can be a host or a...
RFC 3596. When a dual-stack host queries a DNS server to resolve a fullyqualifieddomainname (FQDN), the DNS client of the host sends two DNS requests, one...
A doppelganger domain is a domain that is spelled identically to a legitimate fullyqualifieddomainname (FQDN) but missing the dot between host/subdomain...
records to locate the servers for SIP domain while hostport can be an IP address or a fullyqualifieddomainname of the host and port. If secure transmission...
Each label represents one of the dot-separated substrings in a fullyqualifieddomainname (FQDN). The list is terminated by either a single null-byte representing...
the certificate should be issued, identifying information (such as a domainname) and a proof of authenticity including integrity protection (e.g., a...
Home FTTP—Fiber To The Premises FTP—File Transfer Protocol FQDN—FullyQualifiedDomainName FUD—Fear Uncertainty Doubt FWS—Folding White Space FXP—File eXchange...
opened with a greeting by the server, usually containing its fullyqualifieddomainname (FQDN), in this case smtp.example.com. The client initiates its...
fast-flux is to have numerous IP addresses associated with a single fullyqualifieddomainname, where the IP addresses are swapped in and out with extremely...
represent the namespaces for URLs, fullyqualifieddomainnames, object identifiers, and X.500 distinguished names; but any desired UUID may be used as...
domain does not have a formal name and its label in the DNS hierarchy is an empty string. All fullyqualifieddomainnames (FQDNs) on the Internet can be...
published on April 12, 2016. It supports issuing certificates for fully-qualifieddomainnames, such as example.com or cluster.example.com, but not wildcards...
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