What does computer network security mean?

The security of computer network refers to the security of network shareable resources; the specific meaning of computer network security will change with the changes of users. Different users have different familiarity and requirements for network security. Network sharing It uses computers and other terminal devices as carriers to exchange information and share resources with the help of the Internet, a public-facing social organization.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

What is the security of computer network?

The security of computer network refers to the security of network shareable resources

The popularity of network technology has increased People's reliance on the Internet will cause more damage and chaos than ever before. This also requires higher requirements for network security and makes network security more and more important. Network security will inevitably develop with the development of network applications.

Regarding "computer security", the definition given by the International Organization for Standardization is: "The technical and governance security protection measures established and adopted for data processing systems to protect computer hardware and software data from accidental and malicious causes and leakage”. "Computer security" includes physical security and logical security.

Among them, logical security can be understood as what we often call information security, which refers to the protection of the confidentiality, integrity and availability of information, while network security means the extension of information security, that is, network security. It is to protect the confidentiality, integrity and availability of network information.

The specific meaning of computer network security will change with the changes of users. Different users have different familiarity and requirements for network security. From the perspective of ordinary users, they may only want personal privacy or confidential information to be protected when transmitted on the network to avoid eavesdropping, tampering and forgery; network providers are not only concerned about the security of this network information, but also consider how to handle it they.

Sudden natural disasters, military strikes, etc. damage network hardware. When network abnormalities occur, how to restore network communications to maintain the continuity of network communications. Essentially, network security includes the security of the hardware and software that make up network systems and the information transmitted over the network so that they are not compromised by accidental or malicious attacks. Cybersecurity has both technical and problematic aspects. In terms of governance, these two aspects complement each other and are indispensable. Man-made network intrusions and attacks pose new challenges to network security.

Network sharing uses terminal equipment such as computers as carriers to exchange information and share resources with the help of the Internet, a public-facing social organization, and allows others to share the fruits of their labor

Expand knowledge

Computer network refers to multiple computers with independent functions in different geographical locations and their external devices connected through communication lines. In the network operating system , a computer system that realizes resource sharing and information transmission under the management and coordination of network management software and network communication protocols.

Computer networks are mainly interconnected by some general-purpose, programmable hardware that is not designed to achieve a specific purpose (for example, transmitting data or video signals). These programmable hardware can be used to transfer many different types of data and support a wide and growing number of applications.

Definition classification

In a broad sense

Computer network is also called computer communication network. The simplest definition of a computer network is: a collection of interconnected, autonomous computers that share resources. If this definition is used, the early terminal-oriented networks cannot be regarded as computer networks, but can only be called online systems (because many terminals at that time cannot be regarded as autonomous computers). But as hardware prices fall, many terminals have a certain degree of intelligence, so the strict boundaries between "terminals" and "autonomous computers" are gradually lost. If a microcomputer is used as a terminal, according to the above definition, the early terminal-oriented network can also be called a computer network.

In addition, from a logical function point of view, a computer network is a collection of computer systems that use communication lines to connect multiple computers for the basic purpose of transmitting information. A computer network consists of transmission media and communication equipment.

From a user's perspective, a computer network is defined as follows: there is a network operating system that can be automatically managed by the user. It calls the resources called by the user, and the entire network is transparent to the user like a large computer system.

A more general definition is: using communication lines to connect geographically dispersed computer systems and communication equipment with independent functions in different forms, and realizing resource sharing and communication with fully functional network software and protocols. information transfer system.

Generally speaking, a computer network is to interconnect computers distributed in different geographical areas with specialized external devices using communication lines to form a large-scale and powerful system, so that many computers can easily transfer information to each other and share information. Hardware, software, data information and other resources. Simply put, a computer network is a collection of many autonomous computers interconnected by communication lines.

The simplest computer network has only two computers and a link connecting them, that is, two nodes and a link.

Press to connect

A computer network is a collection of autonomous computers interconnected through lines. To be precise, it is a collection of independent computers distributed in different geographical locations. A system that connects capable computers, terminals and their ancillary equipment with communication equipment and communication lines, and configures network software to realize computer resource sharing.

On demand

A computer network is a large number of independent but interconnected computers that work together to complete computer tasks. These systems are called computer networks.

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