计算机英语论文之网络安全性

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The Security of Computer Network

With the rapid development of information technology, network and network information security technology have affected the social politics, economy, culture and military, and other fields. The way to network access and the spread of information has become one of the important features of modern information society. The maturity of Network technology makes network’s connection easier, and when people enjoy the convenience of network, the network security is also increasingly threatened. Security’s needs keep the society each horizons, and people need to protect information, in the process of storage, processing or transmission, will not be illegal accessed or deleted, to ensure that their interest from damage. Therefore, network security must have strong enough security protection measures to ensure the safety of network information, complete and available.

However, few people know the definition of network security, and in nature, network security is the safety of information on the web, and refers to the network system’s flowing and save data, not by accidental or malicious damage, leak, change, and the normal work of continuous systems, network services don’t interrupt. Broadly speaking, which involves the privacy, integrity, and availability, authenticity and related technology and theory of network information is the network security to areas of research.

Computer network security includes the following contents, such as the host and terminal data security, data security when data is flowing and data protection of the whole network. As everyone knows, necessarily with the connection of several hosts and corresponding cable in the terminal, forming a computer network can realize in the management of network software. However, as a running network, its large amounts of data and information are stored in the host, terminal or extern memory, and it is vital that how to prevent illegal users’ access. The range of computer communication is expanding, and it has gone far beyond the precinct of LAN. Therefore, the data in the transmission is vulnerable, and we can encrypt the message data to make others expect legal person not know. In the whole data communication network, we should take some measures to protect data.

There are some factors to influence network security. The first one is Information leak. The information on the network is wiretapped. The second one is information tamper. such network infringe is called active offender. The third one is transmission of illegal traffic. Users may allow themselves to communicate with others on a type, but they prohibit the communication of other types. The fourth one is environment effect. The natural environment and social environment have great adverse effects on computer network. The fifth one is human safety factors. If the managers don’t have a correct use according to regulations, and even leak the key’s information of system on purpose, the safety consequence is inestimable.

As we know, there are many technologies to protect computer network, and now the more mature security technology of wildly use is mainly: firewall technology, anti-virus technology, etc.

Firewall technology is the security application measures that network takes to


implements access control to Internal and external nets communication through the predefined security strategy.

Data encryption technology is the management technology that can be divided into data storage, data transmission, identify to data integrity and secret key according to the different effect. Data storage encryption technology is aimed at preventing the data on the link from losing. The purpose of data transmission encryption technology is encrypting data flow which is running. The identify technology is aimed at transferring and accessing intervention information. About firewall technology, there are two kinds. Single anti-virus software is installed in the single generally and detects remote resources connecting local place with workstation in the way of analysis and scanning, eradicate the virus.

The computer network has developed rapidly in the global range, and its application almost includes the areas of human life and work. It brings us unprecedented convenient at the same time, but also give us a large quantity of difficult problems. The computer network security is a comprehensive subject, related to technology, management, use and maintenance etc various aspects. To ensure the safety of computer network system, we should have a mixed use among various safety protection strategies, and will also develop more and more security solution technology to make network security and management level continuously improve.

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