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Security Dictionary
Can't tell 'smtp' from 'snmp'? Find the precise meaning of these and hundreds of other security-related terms in our convenient and up-to-date Security Dictionary.
domain name
(I) The style of identifier--a sequence of case-insensitive ASCII labels separated by dots ("")--defined for subtrees in the Internet Domain Name System [R1034] and used in other Internet identifiers, such as host names (e.g., ""), mailbox names (e.g., ""), and URLs (e.g., ""). (See: distinguished name, domain.)

(C) The domain name space of the DNS is a tree structure in which each node and leaf holds records describing a resource. Each node has a label. The domain name of a node is the list of labels on the path from the node to the root of the tree. The labels in a domain name are printed or read left to right, from the most specific (lowest, farthest from the root) to the least specific (highest, closest to the root). The root's label is the null string, so a complete domain name properly ends in a dot. The top- level domains, those immediately below the root, include COM, EDU, GOV, INT, MIL, NET, ORG, and two-letter country codes (such as US) from ISO-3166. [R1591] (See: country code.)

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