Discuss the functions that network security should have, what is network security, and why should we

Network security is divided into internal and external network security. The security of the extranet mainly involves the management of anti-attack, anti-intrusion, anti-foreign virus, anti-web page tampering, and online behavior. Intranet security is mainly to prevent illegal network requests on the intranet, prevent illegal operation of terminals, and prevent anti-virus systems of terminals.

Cyber security means that the hardware, software and data in the network system are protected from damage, alteration and leakage due to accidental or malicious reasons, and the system runs continuously, reliably and normally, and the network service is not interrupted.

Cyber security encompasses a wide range of contents, including all personal information, public information, personal data, public data, etc., account security, and property security that appear on the network.

Network security refers to the prevention and monitoring of resources that can be accessed by the network without the authorization of others. In layman's terms, it is to prevent the data from being maliciously destroyed, changed and stolen by others. Let the program run smoothly.

What is Cybersecurity? Why focus on cybersecurity? Now, they are all defrauding money on the Internet, so network security is also very important, don't believe in those rhetorical things to teach, in addition, don't casually go to sweep what ***, to receive any money.

It is so that you can surf the Internet without being implanted with illegal programs, etc.

Cybersecurity is important.

1.System security: The security of the operation system is to ensure the security of the information processing and transmission system.

It focuses on keeping the system up and running. Avoid damage and loss to the system storage, processing, and transmission of messages due to system collapse and damage. Avoid leakage due to electromagnetism.

Network security is the information security on the network, which means that the hardware, software and data in the network system are protected from accidental or malicious reasons to be destroyed, changed and leaked, the system runs continuously, reliably and normally, and the network service is not interrupted. Broadly speaking, all relevant technologies and theories related to the confidentiality, integrity, availability, authenticity and controllability of information on the network are the fields to be studied in network security. Cyber security involves both technical and management issues, and the two aspects complement each other and are indispensable.

The technical side is mainly focused on preventing attacks from external illegal users, while the management side focuses on the management of internal human factors. How to more effectively protect important information and data and improve the security of computer network systems has become an important issue that must be considered and solved by all computer network applications.

Network security means that the hardware, software and data in the network system are protected from accidental or malicious reasons to be damaged, changed or leaked, the system runs continuously, reliably and normally, and the network service is not interrupted.

Cybersecurity, by its very nature, is information security on the network. Broadly speaking, all related technologies and theories related to the confidentiality, integrity, availability, authenticity and controllability of information on the network are the research fields of network security.

The purpose of network security is to ensure the smooth progress of the user's business, and meeting the user's business needs is the primary task of network security.

The specific meaning of cybersecurity changes depending on the "perspective". For example, from the perspective of users (individuals, enterprises, etc.), they hope that information involving personal privacy or business interests will be protected by confidentiality, integrity and authenticity when transmitted on the network, so as to prevent others or opponents from infringing on users' interests and privacy by means of eavesdropping, impersonation, tampering, denial, access and destruction.

The concept of cybersecurity.

Network security usually refers to the security of computer networks, and in fact it can also refer to the security of computer communication networks. The computer communication network is a system that interconnects several computers with independent functions through communication equipment and transmission, and realizes information transmission and exchange between computers with the support of communication software. The computer network refers to the system that uses communication means to connect a number of independent computer systems, terminal equipment and data equipment that are relatively scattered in the region for the purpose of sharing resources, and exchanges 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, and it should be able to realize 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 there is no fear subjectively. That is, the object does not worry about its normal state being affected.

Network security can be defined as: a network system is not subject to any threats and infringements, and can normally realize the function of resource sharing. In order to make the network realize the resource sharing function normally, it is necessary to ensure the normal operation of the hardware and software of the network, and then to ensure the security of data and 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 approach to cyber security is to implement limited sharing.

Network security refers to the security of shareable resources on a network.

The specific meaning of computing machine network security will change with the change of users, different users have different familiarity and requirements for network security, network sharing is based on computers and other terminal equipment as the carrier, with the help of the Internet, a public-oriented social organization, for information exchange and resource sharing.

The popularization of network technology has increased people's dependence on the network, and the destruction of the network will cause more losses and chaos than before. This also makes it necessary to put forward higher requirements for network security, and also makes the status of network security more and more important. Cybersecurity is bound to evolve with the development of network applications.

With regard to "computer security", the definition given by the International Organization for Standardization is: "the technical and governance security safeguards established and adopted for data processing systems to protect computer hardware and software data from accidental and malicious causes and leaks". "Computer security" includes both physical and logical security.

Cybersecurity Definition Classification:

Computer networks are also known as computer communication networks. The simplest definition of a computer network is: a collection of interconnected autonomous computers for the purpose of sharing resources.

According to this definition, none of the early terminal-oriented networks can be regarded as computer networks, but can only be called online systems. However, with the decline of hardware, many terminals have a certain intelligence, so the "terminal" and "autonomous computer" have gradually lost their strict boundaries.

In addition, from the perspective of logical function, a computer network is a collection of computer systems that connect multiple computers with communication lines for the basic purpose of transmitting information, and a computer network consists of a transmission medium and communication equipment.

From the user's point of view, a computer network is defined as having a network operating system that can be automatically managed by the user. It calls the resources that the user has called, and the entire network is transparent to the user like a large computer system.