Reasons for the asymmetry between network attack and defense

# Network software generally refers to the system’s network operating system, network communication protocols and application-level special software that provides network service functions.

In a computer network environment, software used to support data communications and various network activities. Systems connected to computer networks usually configure different network application systems based on the characteristics, capabilities and service objects of the system itself. (Recommended learning: web front-end video tutorial)

The purpose is for local users to share the resources of other systems in the network, or to provide the functions and resources of the local system to the network used by other users. To this end, each computer network develops a set of network protocols that the entire network abides by, and requires each host system in the network to configure corresponding protocol software to ensure that different systems in the network can communicate and cooperate with each other reliably and effectively. .

Network hardware generally refers to extreme computer equipment, transmission media, and network connection equipment. As of 2011, there are many network-connected devices with varying functions and complexity.

Computers in the network can be divided into servers and workstations according to their different functions. The main function of the server is to control and coordinate the operation of each workstation on the network through the network operating system, process and respond to various network operation requirements sent by each workstation at the same time, and provide network services.

The workstation is the workplace of each network user, usually a computer or terminal. The workstation is connected to the network server through the transmission medium through the network interface board (network card) inserted in it.

According to the application types provided, network servers can be divided into several categories: file servers, application servers, and communication servers. Usually a network has at least one file server, and the network operating system and its application programs and shared hardware resources are installed on the file server.

The file server only provides hard disk sharing, file sharing, printer sharing and other functions for the network. When the workstation needs to share data, it takes it from the file server. The file server is responsible for the management, reception and sending of shared information. It does nothing to help the workstation process the requested information.

With the emergence of distributed network operating systems and distributed database management systems, network servers are required to not only have file server functions, but also be able to handle tasks submitted by users.

Simply put, when a network workstation wants to operate on shared data, the specific control operation is not only the processor at work, but also the processor on the network server, that is, there are multiple processors on the network. A processor processes a transaction. A server that has the function of executing user applications is called an application server.

What people say is that workstations in general microcomputer LANs do not share the CPU resources of the network server. This can be achieved if there is an application server. If the application is a database management system, it is sometimes called a database server.

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