Analyze the fundamentals of a WiFi network

In the basic principle of the network, it is mainly a signal problem, the signal source and the emission source, which are different as a whole, and then the effect is also different.

The principle of wifi network,This is to connect them together.,Summoning shadows can also be directly admitted to the few.,So this has to be used directly by me.。

WiFi uses radio waves for two-way transmission, the most commonly used equipment is a wireless router, WiFi can connect electronic terminals to each other wirelessly, WiFi has higher bandwidth, stronger radio frequency signal, low power consumption and other characteristics.

WiFi stands for Wireless Fidelity. The term was coined by a branding company and usually just comes in the form of an abbreviation. It describes a radio wireless LAN technology for IEEE standards-based devices and is maintained by the Institute of Electrical and Electronics Engineers (IEEE) LAN MAN Standards Committee (IEEE 802).

Precautions for the use of wifi.

When choosing a WiFi hotspot in a public place, you may encounter a very similar and confusing WiFi name, so be sure to see the hotspot name clearly, or verify with the relevant personnel on site, and do not easily choose to connect to avoid falling into the trap of hackers.

Some mobile phones have the function of wifi automatic connection in the network settings, as long as there is free wifi, the mobile phone will be automatically connected, and users can easily fall into the trap of hackers without knowing it. Therefore, it is best for users to set the WiFi connection function to manual. Keep your laptop and mobile phone firewalls and antivirus software up to date to avoid being tricked.

Wireless network in the category of wireless LAN refers to the "wireless compatibility certification", which is essentially a commercial certification, but also a wireless networking technology, which used to connect to the computer through network cables, and Wi-Fi is connected to the network through radio waves; The common one is a wireless router, so the effective range of the radio wave coverage of this wireless router can be connected to the Internet by Wi-Fi connection, if the wireless router is connected to an ADSL line or other Internet lines.

If the mobile phone has a Wi-Fi function, when there is a Wi-Fi wireless signal, you can access the Internet without going through the network of China Mobile Unicom, saving traffic fees.

Wireless network wireless Internet access is more commonly used in big cities, although the wireless communication quality transmitted by Wi-Fi technology is not very good, the data security performance is worse than Bluetooth, and the transmission quality needs to be improved, but the transmission speed is very fast, can reach 54Mbps, in line with the needs of personal and social informatization. The main advantage of Wi-Fi is that it does not require wiring, and it can not be limited by wiring conditions, so it is very suitable for the needs of mobile office users, and because the transmitted signal power is less than 100MW, which is lower than the transmit power of mobile phones, Wi-Fi Internet access is relatively safest and healthiest.

However, the Wi-Fi signal is also provided by the wired network, such as ADSL at home, community broadband, etc., as long as you connect a wireless router, you can convert the wired signal into a Wi-Fi signal.

How Wi-Fi networks work.

Wi-Fi is very similar to radio signals, both transmit data with the help of waves. These waves have different frequencies, amplitudes, and periods. Wi-Fi does the same thing as radio, transmitting data on a very different frequency.

At least one AP and one or more SSIDs need to be broadcast once every 100ms through the signal station packet, and the transmission rate of the signal station packet is 1 Mbits, and the length is quite short, so this broadcast action has little impact on the network performance. Since the minimum transmission rate specified by Wi-Fi is 1 Mbits, it is ensured that all Wi-Fi Hi terminals can receive this SSID broadcast packet, and Hi can use this to decide whether to connect with the AP of this SSID.

The user can set which one they want to connect to, always open their connection standard to the client and support roaming. But it also means that one wireless adapter has the potential to outperform the others. Since it transmits signals over the air, it has the same characteristics as non-switched Ethernet.

Whoever arranges and sets up the AP is who provides it, AP is the access point, if the AP is not connected to the Internet, it is a local area network, and you use the router to connect the desktop, if the router WAN port is not connected, it is not possible to access the Internet.