The tertiary security network includes

The three-level security network includes enterprise security, department security and terminal security.

First, the first-level security network: enterprise-level security.

1, Firewall and Intrusion Detection System (IDS)

These systems can monitor network traffic and identify and prevent potential attacks.

2. Security policies and processes

Establish clear security policies and procedures, such as how employees handle sensitive information and how to access and store data.

3. Encryption and authentication

Using encryption technology to protect the confidentiality of data, only authorized personnel can access the system through authentication.

Second, the secondary safety net: departmental safety.

1, access control

According to the needs of the department and the role of personnel, access control is carried out on the network and system.

2. Audit and monitoring

Through auditing and monitoring tools, network activities can be tracked and abnormal behaviors can be found in time.

3. Safety training and awareness raising

Conduct regular network security training for department employees to improve their awareness of network security.

Third, the third-level security network: terminal-level security

1, antivirus software and anti-malware software

Install and update anti-virus software and anti-malware software to detect and eliminate malicious programs such as viruses and trojans.

2. Password management and authentication

Use strong passwords and change them regularly. Using multi-factor authentication method to improve account security.

3. Safety awareness and training

Conduct terminal security training for employees to improve their ability to identify common network threats.

Definition and function of network

I. Definition of network

Network refers to a computer system consisting of several computers, terminal equipment, transmission media and routers, which are interconnected by communication lines and protocols to realize data transmission and resource sharing.

Second, the function of the network.

1, data transmission

One of the basic functions of the network is to transmit data. Users can transmit various types of data through the network, such as text, images, audio and video.

2. Enjoy resources * * *

Network allows computers in the network to share resources, such as files, printers, scanners, etc. This enables multiple users to access and use these resources at the same time, which improves the utilization rate of resources.

3. Distributed processing

The network can decompose a complex big problem into several smaller sub-problems to be handled by different computers. This distributed processing method can improve the computational efficiency and performance.

4. Information retrieval

The network provides abundant information resources and retrieval tools, and users can retrieve all kinds of information through the network, such as news, weather forecast, academic papers and so on.