The term "cn" can refer to various concepts depending on the context. In technology, it often stands for "Common Name," which is used in digital certificates to identify the entity associated with the certificate. This is crucial for establishing secure connections over the internet, such as in SSL/TLS protocols. In another context, "cn" can represent the country code for China in international standards. It is used in various applications, including internet domain names and vehicle registration codes. Understanding these meanings helps clarify discussions in both technology and global contexts.