With the rapid development of information, the network jammer has also been developed today. For example, in order to prevent cheating, many students will use communication tools to do non compliant acts in the examination room, and the school has repeatedly prohibited them. In order to pull the students out of the "quagmire", they adopted some management methods and chose to install network jammers. The purpose of the school is to make students rest and stop playing games. It is more effective to equip network jammers than to formulate strict management measures.

Of course, the emergence of network jammers is not only because of these reasons, but also because of the needs of various users. The network jammers are produced to meet their needs. They are mostly used in enterprises, confidential institutions and hospitals, and are still widely used.

However, to ensure the effectiveness of shielding projects, the following basic requirements need to be met:

① First of all, the scheme must be designed and implemented in accordance with the actual building structure, layout and specific distribution of on-site signals.

② It is required that the network jammer equipment used shall be advanced in technology, reliable in operation and tested by a large number of successful cases. For extremely strong signals, there should be targeted shielding technology.

③ The design, installation and commissioning personnel must be familiar with relevant professional theories, have many years of experience in shielding design, installation and commissioning, and be equipped with necessary professional testing instruments and equipment.