What are the three types of top level domains in the current DNS?

The main TLDs are:

top: indicates high-end, top-level, career breakthrough, international common domain name;

com: Represents a commercial organization, which is the oldest domain name suffix that appeared more than 30 years ago.

Anyone can sign up. .com format;

VIP: means honorable, member, special;

gov: indicates ** organization;

edu: denotes an educational institution;

mil: denotes a military institution;

co: represents community and company;

biz: denotes a commercial organization;

Reasonable time management is equal to saving time.

1. www is the global information network.

The Chinese name is "World Wide Web,.""Globe.com.

etc., often referred to as the web for short.

2. com means the domain name registered by the commercial group; As.

3. CN is the Internet network domain name and the national top-level domain name.

Indicates the country domain name of China.

4. Some ** are not www because of the front; www is a second-level domain name, and no www is a first-level domain name.

For example, it is a first-level domain name, and it seems to be a second-level domain name.

5. Some ** are not com because of the back; Although any company in the world can be registered. .com, but most countries (excluding the United States) usually add and to their ccTLD. com has subdomains for a similar purpose.

These subdomains have these forms:Or. , xx stands for the ccTLD.

For example: Australia.

United Kingdom (..)New Zealand.

China (.).Japan (..)South Korea (..)Israel.

Pakistan (.).Hong Kong (.).India (.).and Taiwan (.).

A top-level domain name is also called a first-level domain name, and a domain name is made up of two or more words, separated by a dot, and the rightmost word is called the top-level domain, such as .

There are two types of top-level domains: one is country code top-level domains. For example, China is CN, the United States is US, etc.; The second is international top-level domain names, such as industrial and commercial enterprises.

com, which means a non-profit organization. org, which represents the network provider. .net, etc.

The second-level domain name is the second-level domain in English, abbreviated as SLD, which is a domain under the top-level domain name in the Internet DNS hierarchy. The second-level domain name is the penultimate part of the domain name, and the second-level domain name is the domain name that is separated from the main domain name. Like what.

Top-level domains are also called top-level domains.

First-level domain name: e.g. China. CN, Japan is. JP etc.

Second-level domain name: This is indicated in the example.

Rong industrial and commercial enterprisescom, which represents the network provider'snet, which stands for the non-profit organizationorg, etc.

Professional definition: A first-level domain name is one level before "com top net org".

A second-level domain name is one level that is preceded by a first-level domain name.

New top-level domains: e.g. generic. xyz, for red. red, on behalf of the person. men。

Second-level domain name (SLD) [Professional definition]: A second-level domain name is a top-level domain (level 1.

domain name) version, the whole body of the domain name includes two [conventional understanding]: The second-level domain name is the next level of the top-level domain name (first-level domain name), and the domain name as a whole includes two What is a second-level domain name A second-level domain name is a geographic domain name based on a top-level domain name, and in general, a second-level domain name is a record of a domain name.

A domain name consists of two or more words.

, separated by a dot, and the rightmost word is called the top-level domain. The top-level domains we have contacted are divided into two categories: one is the country code top-level domains (NTLDS), which are currently assigned to more than 200 countries in accordance with ISO3166 countries, such as CN in China, JP in Japan, etc.; The second is the Generic Top-Level Domains (gTLDS), such as the

com, which represents the network provider'snet, which stands for the non-profit organizationorg, etc.

com: indicates a commercial organization.

comnet: indicates a network service organization.

org: indicates a non-profit organization.

top: indicates high-end.

wang: indicates a domain name for Chinese people.

gov: indicates ** organization;

edu: denotes an educational institution;

mil: denotes a military institution;

biz: denotes a commercial organization;

info: indicates that information is provided.

mobi: a dedicated mobile phone domain name.

pro: Doctor, accountant.

museum: Museums.

int: denotes an international agency.

aero: Indicates an aviation agency.

post: denotes a postal service.

rec: denotes an entertainment establishment.

asia: Indicates an Asian institution.

The top-level domains are: .com-- For commercial establishments.

It is the most common top-level domain. Anyone can sign up. .com format;

net—Originally used for network organizations, such as Internet service providers and repairers. Now anyone can sign up to.

.net. .org – is for all kinds of organizations, including non-profit organizations.

Now anyone can sign up to. org. .

EDU – for educational institutions. .mil - for the military sector

gov – for the ** sector The new top-level domain names are in the form of:biz;.

info;.name;.pro;.

aero; .coop;.museum.

biz --- used instead. TLDs for commercial companies; (Note:.)

biz is a customary abbreviation of business); info --- used instead. .com, for businesses that provide information services; .

name--- a top-level domain dedicated to an individual; .pro--- top-level domain dedicated to professionals such as doctors, lawyers, accountants, etc.; (Note: Pro is a customary abbreviation of professional);

coop --- top-level domain dedicated to business cooperatives; (Note: Coop is a customary abbreviation of cooperation); aero--- a top-level domain dedicated to the air transport industry; .

museum--- top-level domain dedicated to museums.

In the Domain Name System, the top-level domain com represents that the ** is generally a commercial institution or company and is generally accessible internationally.

com is an abbreviation for commercial and indicates the original intent of the commercial organization to register this domain namecom is currently the most widely popular generic domain name format in the world, with more than 100 million users worldwide, and all international companies will register. .com domain name.

This can be provided by an ICANN-certified domain name registrar, known as Registrar, the international authority on domain name and IP address management. COM (Commercial Establishment) registration.

The top-level domain com represents:

com is the abbreviation of commercial, which indicates a commercial nature, and the domain name ending with com is the earliest generic top-level domain name. The first .com domain name in history was born on March 15, 1985, when the operating system for personal computers was mainly the use of operating systems.

It's all, divided into three categories, ccTLDs, international top-level domains, and gTLDs.

Top-level domain name The type of domain name.

com Business OrganizationsEdu Educational InstitutionsGov **DepartmentsINT International OrganizationsMIL Military DepartmentsNet Network AgenciesOrg Non-Profit OrganizationsCountries** Various Countries.