How many levels of network security protection are there?

Network security protection level is an important system of national information security protection in China, aiming at improving the security performance and confidentiality of various information systems and ensuring national information security. According to the Network Security Law of the People's Republic of China and the Measures for the Administration of Network Security Level Protection, the classification of network security level protection is divided into five levels, namely, level one, level two, level three, level four and level five, and the levels are improved in turn. The higher the level, the stricter the safety protection requirements.

The first level is the highest level, which is suitable for major national security industries and key information infrastructure, and requires high-intensity security protection and confidentiality; The second level is suitable for information systems involving national security and important industries, and requires higher security protection capabilities; The third level is suitable for important information systems and personal information systems in the industry, which need certain security protection measures; Level 4 applies to personal information systems, general information systems of enterprises and institutions, etc. And require basic safety protection measures; Level 5 is suitable for Internet information systems and small enterprise information systems. , and need the most basic security measures.

The classification of network security level protection aims at standardizing the security protection standards of information systems and ensuring the security performance and confidentiality of various information systems. Different levels of information systems need to abide by different security protection measures and security management systems to ensure the safe and stable operation of information systems.