The difference between 5gWiFi and 2.4WiFi:

1. Wi-Fi is a kind of terminal that can connect personal computers, handheld devices (such as PDAs, mobile phones) and other terminals to each other wirelessly. technology. It can be simply understood as wireless Internet access. Almost all smartphones, tablets, and laptops support Wi-Fi Internet access. It is the most widely used wireless network transmission technology today. As long as the traditional router is replaced by a wireless router, you can enjoy Wi-Fi wireless network with simple settings.

2. The full name of WiFi is Wireless Fidelity, which is wireless fidelity. It was originally a brand certification for the commercialization of wireless LAN technology. The standardization label for the first generation of WiFi technology is actually 802.11, which was first formulated by IEEE (Institute of Electrical and Electronics Engineers) in 1997. It was mainly to make wireless network products of different brands universal and compatible. It is also often said that Think of Wi-Fi as a synonym for the IEEE 802.11 standard.

3. Since 1999, IEEE has upgraded the 802.11x technical standard many times. During this period, multiple versions such as 802.11a, 802.11b, 802.11g, and 802.11n have appeared. The biggest difference lies in the continuous improvement of transmission speed and the continuous expansion of signal coverage. In order to facilitate promotion, some related manufacturers organized an industry alliance, which was renamed the "WiFi" alliance in 2000 and used WiFi as the trademark to promote wireless LAN technology.

Wi-Fi can be divided into five generations

1. The first generation 802.11, formulated in 1997, only runs at 2.4GHz, with the fastest speed of 2Mbit/s

The second generation 802.11b, only runs at 2.4GHz, with a maximum speed of 11Mbit/s, and is being gradually phased out

The third generation 802.11g/a, runs at 2.4GHz and 5GHz respectively, with a maximum speed of 54Mbit/s

The fourth generation 802.11n can run at 2.4GHz or 5GHz, with the fastest 72 and 150Mbit/s at 20 and 40MHz bandwidth

The fifth generation 802.11ac (commonly known as 5G WiFi), Only runs on 5GHz

2.5GHz is a technical standard 802.11ac launched by the Wi-Fi Alliance

In 2012, IEEE's 802.11x technical standard was upgraded to the latest 802.11ac version. For the first time, support for the 5GHz frequency band has been achieved, while the previous four generations of technical standards only used the 2.4GHz frequency band for signal wireless transmission. The core technology of the 802.11ac standard is mainly based on 802.11a and continues to work in the 5GHz frequency band to ensure downward compatibility (can cover both 5GHz and 2.4GHz frequency bands), but the data transmission channel will be greatly expanded, and the theoretical transmission speed of the new standard It is expected to reach a maximum of 1Gbps and can transfer 125MB in seconds.