A domain name is a familiar and easy-to-remember name for a computer on the internet. For example, zbintel.com is a domain name. Domain names can be categorized into different levels, including generic top-level domains (gTLDs), country code top-level domains (ccTLDs), and Chinese domain names.

1. Generic Top-Level Domains (gTLDs)
Since the Internet originally started in the United States, the earliest domain names did not have country identifiers. Instead, they were categorized by their intended use and ended with different suffixes: .com (for commercial companies), .net (for network services), .org (for organizations and associations), .gov (for government departments), and .edu (for educational institutions), among others. The initial domain name system was mainly used in the United States. However, as the Internet expanded globally, domains like .com, .org, .net, and .gov became universally recognized. Therefore, these domains are often referred to as "generic international domains."

2. Country Code Top-Level Domains (ccTLDs)
Country code domains distinguish different countries and regions. For example, .cn represents China, and .jp represents Japan. Using country code domains allows for clear and distinct domain identification.

3. Chinese Domain Names
The internet originated in the United States, making English the primary descriptive language for internet resources. While this facilitated the internationalization of internet technology and applications, it also posed a barrier for non-English-speaking regions. The introduction of Chinese domain name systems allows Chinese-speaking users to access internet resources using their native language, without changing their writing habits. Organizations like the China Internet Network Information Center (CNNIC) are actively working to support and develop Chinese domain names.