Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you what knowledge you need to learn about network security. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

1. Basic knowledge of computer system

2. Basic knowledge of network operating system.

3. The design of computer application system

4. Basic knowledge of data communication

5. Basic knowledge of system security and data security.

6. Standardization knowledge related to computer network.

network security

Network security usually refers to the security of the computer network, in fact, it can also refer to the security of the computer communication network. Computer communication network is a system that connects several computers with independent functions through communication equipment and transmission media, and realizes information transmission and exchange between computers with the support of communication software. The computer network refers to the system which uses communication means to connect several independent computer systems, terminal equipment and data equipment which are relatively scattered in the region for the purpose of sharing resources, and exchange data under the control of the protocol. The fundamental purpose of the computer network is to share resources, and the communication network is the way to realize the sharing of network resources. therefore, the computer network is secure, and the corresponding computer communication network must also be secure. should be able to achieve information exchange and resource sharing for network users. In the following, network security refers to both computer network security and computer communication network security.

The basic meaning of security: there is no threat objectively and no fear subjectively. That is, the object does not worry that its normal state will be affected. Network security can be defined as: a network system is not subject to any threat and infringement, and can normally achieve the function of resource sharing. In order to make the network realize the function of resource sharing normally, we must first ensure the normal operation of the hardware and software of the network, and then ensure the security of data information exchange. As can be seen from the previous two sections, the abuse of resource sharing has led to network security problems. Therefore, the technical way of network security is to implement limited sharing.

Relative concept

From the point of view of the user (individual or enterprise), it wants to:

(1) the personal information transmitted on the network (such as bank account number and online login password, etc.) will not be discovered by others, which is the user's requirement for the confidentiality of the information transmitted on the network. [3]

(2) the information transmitted on the network has not been tampered with by others, which is the user's requirement for the integrity of the information transmitted on the network.

(3) the source of information sent on the network is real, not fake, which is the user's requirement for identity authentication put forward by all parties in the communication.

(4) the information sender acknowledges the information sent or some operation completed, which is the undeniable request put forward by the user to the information sender.

From the point of view of network operation and managers, it hopes that the local information network will operate normally, provide services normally, and will not be attacked outside the network, and there are no threats such as computer viruses, illegal access, denial of service, illegal occupation and illegal control of network resources. From the perspective of the security and secrecy department, it hopes to filter and prevent blocking of illegal, harmful information involving national security or trade secrets, so as to avoid divulging information about national security or trade secrets through the Internet, avoid causing harm to society and causing economic losses to enterprises. From the perspective of social education and ideology, we should avoid the spread of unhealthy content and correctly guide the positive network culture.

Narrow interpretation

Network security has different interpretations in different application environments. As far as an operating system in the network is concerned, network security refers to the security of information processing and transmission. It includes the security and reliable operation of the hardware system, the security of the operating system and application software, the security of the database system, the protection of electromagnetic information leakage and so on. In a narrow sense, network security focuses on the security of network transmission.

Generalized interpretation

The security of network transmission is closely related to the content of the information transmitted. The security of information content is information security, including the confidentiality, authenticity and integrity of information.

In a broad sense, network security means that the hardware, software and information in the network system are protected. It includes that the system runs continuously, reliably and normally, the network service is not interrupted, and the information in the system is not destroyed, changed or leaked because of accidental or malicious behavior.

The information security requirement means that when the communication network provides people with information query and network services, it ensures that the information of the service object is not threatened by monitoring, stealing and tampering, in order to meet people's most basic security needs (such as confidentiality, availability, etc.). Network security focuses on the security of network transmission, while information security focuses on the security of information itself, which is related to the object it protects.

Because the network is the carrier of information transmission, there is an inherent relationship between information security and network security, and all information on the Internet must be closely related to network security. The meaning of information security includes not only the security of online information, but also the security of offline information. The network security we are talking about now mainly refers to the network-oriented information security, or the security of online information.

The above is what the editor needs to learn about network security. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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