WiFi is also known as "action hotspot" in Chinese. It is the brand certification of the Wi-Fi Alliance manufacturer as a product. It is a wireless LAN technology created in the IEEE 802.11 standard. Based on the close correlation between the two systems, WiFi is often used as a synonym for the IEEE 802.11 standard.
Grounding point, WiFi is what we often call wireless broadband. In fact, it is to convert the wired network signal into a wireless signal for receiving related computers, mobile phones, PDAs, etc. supporting its technology.
The mobile phone has a WiFi function, so when there is a WiFi wireless signal, it is possible not to access the Internet through the mobile Unicom network, thereby eliminating the traffic fee. However, the WiFi signal is also provided by the wired network, such as ADSL at home, broadband in the community, and the like, as long as a wireless router is connected, the wired signal can be converted into a WiFi signal.
At present, whether it is a family, a company or a shopping mall, a hotel, etc., WiFi is used. Compared with 2G, 3G or even 4G Internet access, most of the WiFi speed is fast, power saving, no traffic limitation, and the wireless device does not need to insert a sim card. In other words, you do not need to take the SIM card traffic.
The idea of creating WiFi technology depends to a large extent on the public network using simple arrangements. At the same time, modern WiFi in the field of data transmission can actually be identical to mobile cellular networks. WiFi supports mobility, coverage continuity, mobile user services, automatic authorization in the network, and even roaming with cellular networks.