What is a Wireless Network?

The so-called wireless network refers to a network that can interconnect various communication devices without wiring. Wireless network technology covers a wide range, including global voice and data networks that allow users to establish long-range wireless connections, as well as infrared and radio frequency technologies optimized for short-range wireless connections. According to different network coverage, wireless networks can be divided into wireless wide area networks (WWAN: Wireless Wide Area Network), wireless local area networks (WLAN: Wireless Local Area Network), wireless metropolitan area networks (WMAN: Wireless Metropolitan Area Network), and wireless individuals Local area network (WPAN: Wireless Personal Area Network). ^[1]

Wireless network is a general term for a class of data transmission networks using radio technology. According to different network coverage, different network applications, and different network architectures, wireless networks can be divided into different categories. The classification of wireless networks will be described in detail from the above three perspectives. ^[2]

1. Strong mobility, can break through the limitation of time and space.

Wireless networks transmit network signals by transmitting radio waves. As long as they are within the transmission range, people can use the corresponding receiving equipment to achieve the connection to the corresponding network. This greatly gets rid of space and time constraints, which is impossible for traditional networks. ^[3]

The wireless network can effectively sense the changes in the external environment, and then further understand and learn, and efficiently adjust and configure the relevant resources inside the communication network to meet the changes in the external environment. By fully drawing on wireless cognitive network technology, it can not only resolve the conflict between the increasing demand for spectrum and limited spectrum resources, but also effectively solve the problem of scarce spectrum resources, and promote the reasonable improvement of spectrum application efficiency. ^[5]

Unsafe factors in wireless communication networks pose a huge threat to mobile network users and network operators. To protect the rights and interests of wireless communication network users and operators, it is necessary to do a good job of wireless network security protection technology. Wireless network security service requirements mainly include four points: confidentiality, identity authentication, data integrity, and service non-repudiation. ^[6]

1.Wireless wiretapping risks

The content of network communication in a wireless communication network is transmitted through an open wireless channel. Anyone with a wireless device on this open channel can obtain the information on the wireless channel, which increases the risk of information eavesdropping. Eavesdropping of information on a wired communication network can only be achieved through wire bonding. At the same time, special processing of the communication cable is required. The operation is difficult and easy to find. Wireless communication eavesdropping is relatively easy, so the risk of information leakage in wireless communication networks is also greater. After the mobile user information is leaked, the user will be tracked wirelessly, or attacked and interfered, causing unnecessary harm and loss to the user. ^[7]

1. Popularize network security knowledge, learn network security knowledge, and improve users' awareness of network security; operators regularly maintain network servers, and end users check and backup their important information from time to time to ensure the security of their own data. ^[8]

1.WPKI technology

WPKI (Wireless Public Key Infrastructure) technology is developed on the basis of PKI (Public Key Infrastructure System) in wired networks. In a wired network, a standard key management platform can be used to transparently provide users with cryptographic services such as encryption and digital signatures required for communication network applications, thereby ensuring the confidentiality and validity of data in the user's network. WPKI technology is to provide users with the same security service mechanism as the wired network PKI in wireless networks. ^[6]

1.Security measures for service area identifiers

When the LAN is connected, the service area identifier is a simple password that can provide users with basic information protection. When accessing, you must show the correct service area identifier for correct wireless access. However, in daily use, it is very easy for users to leak their service area identifiers, so that illegal people have the opportunity, and their information security is not guaranteed. Similarly, if the client does not pay attention to the service area identifier of the wireless workstation when setting it up, it is likely to be skipped automatically, resulting in its lack of security protection. ^[9]

Development direction of wireless network

1. Improve the coverage of wireless networks and provide convenient wireless networks for the public

In recent years, the development of wireless networks in China has been very rapid, and people's dependence on them has gradually increased. People prefer wireless networks over mobile networks because they are fast and easy to connect. As far as China's public places are concerned, almost all consumer places such as shopping malls, restaurants, hotels, cafes, etc. provide their customers with free WIFI services for consumers to access the Internet, which has greatly improved Consumer satisfaction has also attracted consumer spending. In recent years, the trend of 5G R & D and trial is very clear. It is understood that the speed of 5G Internet access greatly exceeds the speed of the existing 4G network, which can provide customers with a better network experience. In general, the installation of wireless network equipment is relatively simple. Only routers or wireless network cards can be used to achieve the purpose of network sharing, and the construction cost of wireless networks is far lower than that of limited networks. It can be seen that its economy and practicability are relatively high. In addition to the coverage of wireless networks in public places, wireless networks also cover homes and schools. Generally, the home is connected by a router and a network cable, and the subsequent network settings can be implemented to achieve network coverage of the entire house. School coverage is a method often used in modern colleges and universities. Students can obtain a lot of information by using the campus network. Learning resources have also greatly promoted the development of education informatization. ^[10]

2. Simplify the management of wireless networks, and build convenient wireless networks

Nowadays, the number of wireless network users has increased throughout the year, which has greatly increased the working pressure of wireless devices. At this time, managers need to do a good job of managing wireless network devices to provide people with stable and secure Network experience, the management method provided is best a simple and convenient way, which can greatly reduce the work pressure of managers, and can more easily solve problems related to wireless networks. If you want to achieve simple and convenient management work, you must configure the system and select the correct wireless device. When problems occur, it is sufficient to directly maintain and manage the system. At the same time, in terms of network equipment, relevant personnel need to increase the emphasis on the stable operation of the system, and do a good job of coordination and compatibility of various parts of the system. In the process of selecting network equipment, a more complete wireless device should be selected according to the actual situation, and the traffic should be reasonably allocated to meet the needs of users. ^[10]

Maintenance of wireless network equipment

1.Equipment maintenance is the basis for normal operation of the equipment

According to the nature of maintenance work, equipment maintenance can be divided into daily maintenance, equipment maintenance, and cleaning and updating equipment. Routine maintenance refers to the periodic inspection of each type of equipment, and the surrounding Environment, always know the operating status of the equipment, be familiar with the parameters, noise and temperature of the equipment, and discover the hidden dangers in time. In the actual inspection process, some auxiliary equipment can be used for inspection. Mark the equipment after inspection to ensure that it can easily and clearly distinguish between the equipment that has been inspected and the equipment that has not been inspected. Only by strengthening the routine maintenance of the equipment can problems be found in time and existing problems be solved in time. To avoid major accidents and effectively ensure the operation of the equipment; maintenance and maintenance of equipment requires the staff to regularly check the operating status of the equipment, do a good job of equipment temperature detection and performance supervision, according to each machine's The most suitable maintenance and maintenance work is adopted in actual operation. The cleaning of the equipment and the operation of the equipment will be affected by the surrounding environment. The main problem that affects the heat dissipation of the equipment is dust accumulation. Excessive dust accumulation will cause major equipment loss and reduce The performance of the device affects the actual use of the user. Therefore, the equipment should be cleaned regularly, which can not only provide users with a stable network, but also extend the equipment's use time. Equipment update. Generally speaking, with the development of wireless networks and the increase in the number of users, relevant personnel need to update the equipment's construction mode and management mode. During the update process, the user experience should be the center and the equipment should be updated and improved. , Remove the parts that users are not satisfied with during the experience. In addition, the wireless network is still hacked, which has a great impact on the security and stability of the wireless network. Therefore, managers must pay attention to the establishment of a security mode during the update process, thereby improving wireless The defensive resistance of the network. ^[10]

2.Common faults of wireless network equipment and their countermeasures

Pilot pollution is a common problem in wireless devices. Pilot pollution refers to the existence of a large number of strong pilots in some wireless network communications somewhere inside the device. The solution to pilot pollution is to adjust pilot power and set wireless electromagnetic wave antennas. In the process of setting the electromagnetic wave antenna, it is necessary to adjust according to the actual test results, and in the process of adjustment, it is necessary to appropriately adjust the dominant frequency. ^[10]

3. Adjust the wireless coverage to ensure the security of the wireless network

Wireless networks are generally developed in areas where the economy is relatively developed and where information is exchanged frequently. The most important of these is the security of wireless networks. In order to effectively improve the security of wireless networks, it is necessary to use corresponding data encryption methods and network login authentication, so as to do a good job of security defense. In addition, in order to ensure the security of wireless networks, it is necessary to supervise and maintain wireless devices, to monitor the operating status of wireless network devices in real time, and to take corresponding measures immediately when abnormalities occur. ^[10]

4. Training for related equipment maintenance personnel

The main body of wireless network equipment maintenance is the staff. Firstly, the staff must be trained regularly to improve the professional quality and comprehensive quality of the management staff. This is the basis for ensuring the quality of wireless equipment management in enterprises. Through training, management staff can improve Understanding of principles and some operating techniques. When equipment fails, problems can be identified in a timely manner. In addition, we must consider the quality of each employee. Generally, only one company has high-quality employees, and this enterprise can develop for a long time. Therefore, when selecting employees, enterprises must consider their professional qualities. ^[10]