The unique name that identifies an Internet site. Every domain name consists of one top or high-level and one or more lower-level designators. Top-level domains (TLDs) are either generic or geographic. Generic top-level domains include .com (commercial), .net (network), .edu (educational), .org (organisational, public or non-commercial), .gov (governmental), .mil (military); .biz (business), .info (informational), .name (personal), .pro (professional). Geographic domains designate countries of origin, such as .au (Australia).