(We have introduced how to set up a wireless local area network, and the detailed device setting process of the wireless local area network (router), but it is only how to set up and use a wireless network. Because the wireless network is not tied to the network cable, any wireless devices in the wireless network design can be found. Connect to the wireless network and share the connection to the wireless network; this creates security problems for everyone's own network and data. How to manage this insecurity factor?)