Domain name suffix refers to the symbol representing the type of domain name. Domain names with different suffixes have different meanings. At present, the most popular domain names can be divided into international domain, domestic domain names (including Chinese and English) and national domain names. \ r \ nexample:. com，。 cn，。 Organization,. Information, Net, Clubs and so on. \r\n 1, international domain (iTDs), also known as international top-level domain name. This is also the earliest and most widely used domain name. For example, Industrial and commercial enterprise network. Net to network providers. Org is a non-profit organization. \r\n 2。 Domestic domain name \ r \ Domestic domain name (also called national domain name) refers to the domestic domain name of China according to our usual custom, and the domain name ends with. cn。 Such domain names are published and registered by China Internet Management Center (CNNIC). \r\n cn: China's national top-level domain name \ r \ ncom.cn China company and enterprise organization domain name \ r \ nnet.cn China network service organization domain name \ r \ ngov.cn China government organization domain name \ r \ norg.cn China non-profit organization domain name \r\n 3, national domain name. \ r \ Intuitively speaking, the international domain consists of three or more English letters, such as. com。 Net. org。 Information. Business. Name, etc. The country domain name can only consist of two English letters, such as. Chinese mainland, China. We fight for America. Eu stands for the European Union, and so on. Its purpose is to give the governments of different countries and regions free control space on the Internet. However, strictly speaking, national domain names are now beyond the scope of "country". According to the suffixes of the domain names of 249 countries that have been opened by ICANN (Internet Corporation for Assigned Names and Numbers), many "regions" have their own national domain names except "countries". \r\n ( 1)。 Domain name suffixes of sovereign countries, such as. China (Chinese mainland). United States (United States). Germany (Germany). Britain (UK). Fr (France), etc. \r\n (2)。 Domain name suffixes of ethnic communities, such as. Eu (European union) \r\n (3). Domain name suffixes in special areas of sovereign countries, such as. Hk (hong kong) Mo (Macau). Tw (Taiwan Province Province). Gi (Gibraltar) and so on.