The Internet of Everything has made network communication ubiquitous. People seem to have forgotten what life is like without the Internet. They even have to connect to the Internet to hold a business meeting on an airplane. Taking into account network speed and cost, people are more inclined to choose WiFi networks for access. However, there are also some challenges in this process, such as old protocols and frequency bands, AP setting errors and other issues that often lead to WiFi connection speeds. Slow down.
Complicated Connection Thresholds
WLAN wireless devices provide a globally available, low-cost, and high-bandwidth air wireless interface. However, compared with wired networks, the mobile characteristics of wireless networks make the physical layer The interaction with the protocol layer increases the verification process and complexity. For example, a dynamically configured WiFi network allows terminals to address APs to achieve network access. However, multiple APs will cause problems for WiFi. The latter must choose which AP to associate with, and the AP must also determine which ones are connected accordingly. Legitimate user.
Spaces with multiple households are easily blocked
Generally speaking, wired connections will take relatively little consideration of physical security, but wireless connections must consider space access. The problem. What often happens is that when a large number of users use the same wireless hotspot, since the wireless router mostly provides users with a single channel, as more and more users send and request data through the same channel, the transmission speed gradually slows down. , the delay gradually increases until it reaches the maximum bandwidth, and disconnections and interruptions occur. Sometimes, multiple sites are covered by the same AP, but cannot share signals. In this way, multiple parties will send requests to the AP, causing signal overlap.
Mobile is both joy and sorrow
Unlike dedicated cables, the physical layer and protocol layer of wireless networks must be tested independently, and the actual use of the upper layers must be demonstrated. The reason lies in the mobile and dynamic characteristics of WiFi. Operation and maintenance personnel need to use radio frequency signals to test parameters one by one to ensure that some "hidden nodes" are also operating normally. For example, during WiFi access, the power supply end of the device must have a power management function to reduce the transmit power and save energy when close to the AP. However, wired devices do not have such restrictions.
Security protocols must keep up
Not only communication and interaction protocols, security protocols also plague WiFi networks. For example, 802.11ac can reach standard rates of over 1000Mbps, but if WEP or WPA encryption is used, the data rate will be limited to 54Mbps. How to solve it? It's not complicated. Just enable WPA2 alone using the Advanced Encryption Standard AES. If it is an older terminal, remember to upgrade the firmware version. Of course, it would be better to add an adapter to the terminal, or consider using a wireless bridge with an Ethernet connection.
We should pay attention to the interference problem
If the network channel is smooth and the protocol is taken into account, will the network speed be fast? No. The problem of interference between WiFi cannot be ignored. Reports have pointed out that most residents’ WiFi problems are related to interfering equipment, including wireless phones, surveillance cameras, and even microwave equipment. The 802.11 protocol can resist interference to a certain extent, but bypassing or pausing packet transmission will undoubtedly affect wireless network capacity and performance. For example, a microwave oven will produce interference with a duty cycle of 50%. If the frequency is consistent with the 802.11 wireless access point, it will reduce network capacity and performance by 50%. Research shows that a microwave oven 25 feet away from a wireless access point reduces data throughput by 64%, and frequency-hopping phones reduce it by 19%.
Conclusion
Wifi network communication seems superficial, but the reason behind it is not simple. In addition to the above factors, multi-channel in the 5GHz band, correct AP settings, low data rate compatibility and other methods can improve the WiFi connection effect. On the one hand, users must discover problems with wireless devices in a timely manner, but on the other hand, it is more important that manufacturers consider multiple users when designing wireless access products and try to make users worry less and take less hands-on work.