How to analyze wireless network errors

Wireless Networks are no stranger. Laptops and smartphones can all access wireless networks. This is what we often do in our lives, however, many people may encounter various usage errors when using wireless networks.

I. The main factors affecting the wireless network are transmit power, accept sensitivity, and antenna gain. Currently, the main trend of wireless networks is in signal coverage and transmission rate, generally, the method to enhance the signal is to increase the transmit power and enhance the antenna gain.

1. transmit power: a wireless device uses the transmit power to measure the transmission performance. The larger the transmit power, the longer the transmission distance between wireless products, the wider the coverage, and the stronger the penetration capability. The unit of measurement for transmit power is dbm. This is roughly the same as the light bulb that we use in our lives. The larger the wattage, the brighter the bulb, and the wider the illumination range.

2. Antenna Gain: The gain refers to the ability of the antenna to enhance signal transmission and reception. The higher the gain, the stronger the signal transmission capability and the higher the sensitivity. The gain measurement unit is dbi. The antenna size and internal materials have a great relationship with the antenna gain.

2. In wireless products, products based on the 802.11n draft standards are currently the most advanced technology products with far-reaching signal coverage. It is precisely because many enterprises tend to pursue hardware indicators too much when purchasing equipment, while ignoring the ease of use and price of products, currently, the price of 802.11g-based wireless routers sold in the market is around 200, and the price of 11G wireless NICS is around 150 yuan. Some old wireless NICs currently do not support the latest standards, therefore, compatible products are required, which will result in the lowest network speed.

3. wireless signals are transmitted in the air. As long as the signals are covered, some illegal users can obtain wireless network data without any physical connection. Therefore, it is necessary to prevent illegal terminal access and data leakage from multiple aspects.

1. Identity Authentication is generally used to prevent unauthorized user access, that is, various encryption methods are used to prevent illegal user intrusion. Binding a MAC address is the most common and simplest method. Each wireless network card has a unique MAC address, which is encrypted by binding the AP settings to the MAC address of the NIC, however, this security method applies to family users who do not have high requirements on information. Currently, the most secure method is WPA2 encryption.

2. In addition to threats to the security of the wireless LAN, unauthorized AP access also threatens the entire network. When a Wireless AP is connected to a wired hub, it will be attacked by an illegal AP. The illegal installation of the AP will endanger the valuable resources of the wireless network, which is also worth noting.

3. Viruses and hacker attacks also pose a threat to the wireless LAN. Many networks have a set of well-configured security devices as network shells to prevent illegal attacks, however, the network protected by the shell is very fragile and vulnerable to attacks. Hackers can quickly access the network trunk through simple configuration, so that the network can be exposed to attackers, therefore, preventive measures must be strengthened.

4. We know that the current wireless LAN transmission bandwidth is limited, which is far from enough compared with the wired network. In actual use, due to the physical layer overhead, the actual throughput is only half of the standard, in addition, the actual throughput is shared by all users. The transmission of large data files will generate a large amount of network traffic, so we need to limit the files to be transmitted.

The existence of wireless networks greatly facilitates our lives. If we do not set a wireless router well, it will not be convenient but troublesome. We suggest you do not know much about the router settings, so it is best to first figure out, or find a professional to set up.