Cheating has always existed since ancient times, especially in our era with technological progress, cheating methods are emerging in an endless stream and becoming more and more sophisticated. Of course, we see more and more anti-cheating tools. We commonly have metal detectors, examiners Check, signal blocking and even fingerprint unlocking.
Signal jamming can be said to be the most brilliant method, especially in our era with the continuous improvement of electronic equipment, and it can even evade detection. The current cheating method is almost all people in the examination room bring electronic equipment in to speak the question and output it to the outside world, and then outside the examination room. of people answering questions for the purpose of cheating.
And these all need to be spread through the network. At this time, wifi jammer is particularly important. Of course, we see that wifi signal jammers are not yet popular. They are only used in some important exams, such as college entrance examinations, national exams, and civil servants. , In the future, the effect of signal jammers is good, and the cost is low, and it can be popularized. After all, metal detectors cannot be completely detected in many cases.
In fact, to put it simply, if we regard these cheating electronic devices as a two-way radio, and the receiver in the test room plays the reception outside the test room, then the wifi signal jammer is an influencer to make your radio sound inaudible, and our mobile phones are electronic devices. It needs to communicate with other devices through cell towers.
Wireless communication requires electromagnetic waves. According to the characteristics of electromagnetic waves, our equipment needs to be received within a certain frequency range, so the wifi shield is to affect the frequency of your electronic equipment to make the frequencies of the two sides different, so as to achieve the effect of shielding .
Some people think that I don't need a data network, I use Bluetooth and Wi-Fi. In fact, these networks can be blocked by today's signal jammers. Bluetooth and Wi-Fi frequency bands have already been added to the scanning range, because in fact, each network data And Bluetooth wireless networks are all in different frequency ranges, and these can be shielded by putting them in the scanning range of the signal jammer.
The original wifi jammer device was designed to fight crime and serve law enforcement and the military, so actually buying a signal jammer by yourself would be suspected of breaking the law. In fact, we simply look at the principle of signal shielding, which is very simple and easy to understand. The shielding effect is achieved by affecting different frequency bands.
