Analysis of the five error statements about wireless jamming

Who is the first killer of wireless networks? The answer is, of course, "wireless jamming." So when you face the ubiquitous annoying killer, can you handle it calmly? Do you have the right approach? In the face of the internet circulated about the "killer" all kinds of rumors, what is true, which is false? This article will be with you to find out about the wireless interference of the five wrong statements.

Error statement one: Deploying high-density wireless access points can overcome wireless interference

With the continuous popularization of wireless products, no line by/ap Price is also falling, so many enterprises in order to solve the problem of wireless interference, select the centralized deployment of wireless access points, so through the wireless spectrum of space reuse can greatly improve the capacity and performance of wireless networks. Theoretically, even if there are other wireless disturbances around such a deployed space, it will not affect the normal functioning of the internal wireless network, but is this actually the case?

In fact, if you deploy a wireless access point too centrally, you must reduce the signal transmission power of each access point. If the power is not lowered, then each wireless access point will generate mutual interference (that is, we often say the same frequency interference), affecting the normal use. In order to avoid the same frequency interference, it is necessary to lower the signal transmission power of the access point, and once the transmission power of the signal is lowered, it is difficult to prevent the interference of other high power wireless signals in the periphery. Obviously, this is a problem that can't be got by the fish and Bear's paw.

Summary: By centralizing the deployment of wireless access points you can actually improve the overall performance of your wireless network, but it does not help you overcome wireless interference. Therefore, the method of preventing wireless interference by centralizing the wireless access point is denied.

Wrong saying two: Choose 5GHz Band there is no wireless interference

With the rapid development of wireless applications, no line by, wireless mouse, cordless phone, wireless headset and Bluetooth has been 2.4GHz this public wireless band crowded. So some wireless products are taking the lead in experimenting with dual-band design, which supports both 2.4GHz and 5GHz.

So choose the 5GHz band can escape the wireless interference? Of course not. Undeniably, compared with the 2.4GHz band products, at this stage will cause the 5GHz band interference products are indeed relatively few, even in daily life is difficult to encounter. But the situation is changing, and more and more manufacturers are beginning to realize the advantages of 5GHz, like the same year from 900MHz to 2.4GHz to avoid interference, 5GHz also escape this fate. And there are already using 5GHz cordless phones, radar, induction equipment into use.

Summary: 5GHz did escape the current 2.4GHz congestion, but it can not avoid wireless interference, because more and more devices began to squeeze into the 5GHz of the "highway." So the method of choosing 5GHz to avoid wireless interference is also denied.

Wrong saying three: electrical equipment to wireless interference small

Many wireless devices have been introduced to interfere with wireless networks, but do you know that home appliances also interfere with wireless signals?

In our daily life, microwave ovens, air-conditioning, refrigerators and other high-power equipment will be caused by wireless signal interference, and such interference can not be ignored.

Summary: If you choose the "Auto Select" channel, you will likely experience a sudden network slowdown or network instability in actual use. We recommend that you modify the current channel based on the use of the wireless channel, so that you can get a better wireless network experience. Therefore, it is equally denied that the optional channel can be fully trusted.

Error Four: Wireless interference only affects the performance does not affect the security

Many users feel that wireless network bandwidth is high, especially 11n network, theoretical bandwidth up to 300Mbps, so even if the wireless is disturbed, most also affect some wireless performance, there is nothing to worry about.

But is that really the case? Many wireless disturbances are associated with danger, such as when you are at home through a wireless network, suddenly discovering that the network has become slow and card-like. If you're just thinking of wireless network interference, your personal data is at risk, because it's likely your neighbor is hacking your network through a "rub" card. Of course, he stole not only your network bandwidth, but also likely to steal your personal data information. In addition, in addition to "RUB network card", network virus also has a similar effect, it interferes with your wireless network, but also steal your important data information.

Summary: Through the above introduction, we can see that when the wireless network is disturbed, the performance impact is only a superficial phenomenon, the security problem is the key. Therefore, wireless interference only affects performance, does not affect security this argument is also denied.

Error story five: Wireless network spin down must be due to wireless interference

We know that wireless interference will affect the overall performance of wireless networks, the specific performance is to reduce the rate of wireless transmission. So when the speed of the wireless network suddenly reduced, it must be caused by wireless interference? The answer is, of course, negative.

For example, when we transmit data through a 11n wireless LAN, another wireless client is connected to the wireless network, and you suddenly find that the transmission rate slows down a lot. This may indeed be caused by wireless interference, but it is probably the result of the new client.