Application of Computer Network Communication Technology in Production and Life

China’s rapid economic development, while the level of science and technology has also made great progress, communication engineering is the national infrastructure, in the process of development, we should pay more attention to network security. In the application of computer network communication security technology, the application of data encryption technology is to ensure people’s privacy and security. Today, with the rapid development of Internet technology, computers have been integrated into our life. No matter in study or work, computers are always with us. At present, there are still great risks in the process of using the computer, so data encryption is essential to ensure the security of information and users when the computer is running. The security of computer data and information has gradually become a very important part of computer network management. this paper makes a preliminary analysis and discussion on the problems of computer network management and information security prevention.


Advantages of digital data communication technology
Digital data communication technology and the traditional simulated data is compared with a lot of advantages, the main form of the following: first of all, its transmission unit digital data communication technology for the data frame, therefore in the process of transmission, if there are problems of data transmission, can be timely to edit and correct the error code, it also has to send data frames and detection technology. This improves the reliability and quality of communication to some extent. Secondly, the use of digital communication technology can transform video, image, text and other non-digital data into the digital information needed for transmission, which facilitates the rapid transmission of information in the computer network. Thirdly, digital data communication technology can well strengthen the confidentiality of information, so that the transmitted information will not be intercepted and tampered by some malicious software and hackers, so its information privacy is high, which also ensures the security of the information. Fourth, because of digital data communication technology should have a plenty of more advanced relay equipment, in the information and data transfer process can rise -zoom in and out of the change, so to avoid in the process of passing by outside factors, such as the influence of factors such as noise, so as to ensure the integrity of data transmission, especially for long distance transmission process, will still be able to keep its stability and integrity. Fifth, with the rapid development of digital data communication technology, the technology for reliability, application of a large number of integrated circuits in the equipment, largely reduced the usage of electrical equipment, reduce the cost of the equipment, the equipment is more and more small convenient at the same time, the function optimization, communication equipment is more easy to carry and put [1] .

Using computer network digital data communication technology with high reliability
In the application of the computer as the carrier of data communication technology, in the process of data transfer mode is given priority to with frame transmission, even if in the process of data transmission, data error code or some parts of the machine malfunction can change the situation through the transmission of data frames to find the source of the problem, but also can be judged by the unusual situation of data transmission data and correct the mistake. On this basis, when similar problems are found in the data frames, the technology can correct the wrong data and resend it, thus reducing the occurrence of transmission problems caused by data errors to a certain extent. In people's normal use of computer network in depth, so that people can have a further understanding of this technology.

The new technology of computer network digital data has higher integrity
Communication data usually needs to be transmitted over a long distance, which is compared with the traditional information transmission process, because the transmission of long distance often leads to the digital change of data in the transmission process to some extent. Therefore, this will cause a great disturbance to the integrity and accuracy of the information. As we all know, in the short distance data transmission, such problems will not occur. However, with the continuous development of Internet technology, long-distance data transmission becomes very important. Therefore, there are new challenges for communication technology, and computer network digital data communication technology arises at the historic moment. This makes up for the problem of distortion of long-distance transmission data in the traditional information transmission process, because of the application of digital data communication technology in computer network. More advanced relay technology, which can minimize external interference, such as noise interference, etc. Since the use of relay equipment in computer network digital communication technology, to a large extent to ensure the integrity and accuracy of data transmission, so as to avoid data distortion and the possibility of information loss or even damage.

Technical indicators in digital data communication
One is the rate indicator. The rate in the process of digital data communication refers to the amount of code transmitted per unit of time, and its calculation formula is S= 1/T*log2n. In this formula, T is the width of the pulse, i.e., the pulse repetition period, and n is the number of modulation evaluations. Thus, in a modulator, each independent modulation conversion time corresponds to the corresponding code and is implemented at the same modulation rate as the information transfer rate [4] .
Second, bit error rate. Bit error rate (BER) is an important index to evaluate information reliability level in data transmission system. It has enough scientific level that it can be expressed as P=Ne/N in the specific calculation formula. In the formula, Ne represents the code in which the error occurred during the transmission, and N represents the total number of binaries in the entire transmission Third, channel capacity parameters. In digital data communication technology, channel capacity is the key factor to determine the level of data communication rate, and it is also an effective method to detect the capability of information communication. In computer network systems, bits are used as a common unit of measurement in binary and are also used to express channel capacity parameters. The number of bits per second that can be transmitted is the basic measure of channel capacity.

Basic means of communication
The basic communication modes of digital data communication technology include parallel transmission and serial transmission. For short distance data transmission, parallel transmission is more suitable. When the sender and receiver interact with information and data, multiple data bits can be transmitted in multiple different rows.
The corresponding serial transmission mode is more suitable for remote information communication and transmits data information during this process. In simplex, half duplex, or full duplex constructionBit by bit transmission. Specifically, in simplex structure, only one-way data transmission is supported. The half-duplex structure can adapt to the transmission of two directions, and can also carry out a single data transmission under special circumstances. A full duplex structure is completely two -way data communication [5] .

Multiplexing transmission
The multiplexing mode can be divided into two specific information transmission methods: frequency division and time division. In frequency division multiplexing (FDM) transmission, the total capacity of the channel is decomposed into several independent sub-channels, and the bandwidth of each sub-channel exhibits the same characteristics [6] . It undertakes signal transmission function independently and can operate in parallel during operation to improve communication efficiency.
Time division multiplexing, according to the advance of transmission time, each independent channel is decomposed into several time periods, and multi-signal transmission is carried out. In the process of data transmission, the time period occupied by each signal is different, so as to realize the effect of multiple data transmission at the same time.

4.3Synchronous and asynchronous transmission
During communication transmission, this level of synchronization is continued in each code number in order to ensure the synchronization and integrity of information transmission and receipt. The start and end of data modules and roles should be synchronized. To achieve this goal, it is necessary to achieve through the same, asynchronous transmission. Synchronous transmission is achieved by adding synchronous characters, and timely and effective judgment is made to ensure the same level of data transmission start time and end time. Then confirm the synchronization effect of data transmission. Asynchronous transmission is generally suitable for low-speed transmission devices because the rate at which characters are added to the data is low. Therefore, the corresponding transmission efficiency is also affected, and the structure is more simplified [7] .

Conliution
In short, the development and popularization of computer technology and Internet technology with the development of the current era of society each industry, every field plays a very important role in promoting, but in the current communication over traditional communication technology has the advantages of better, since people used the digital data communication technology, computer network of people's living standard and life quality have been better. Due to its unique transmission speed and reliable transmission security, it satisfies people's demand for information transmission, so this technology has become an essential part of the current society [8] .