Buzz
WiFi stands for Wireless Fidelity, which is a wireless connection method using radio waves. WiFi is implemented on most smart electronic devices nowadays to enable them to connect with each other and to the Internet. WiFi is deployed for high-speed wireless data transmission, eliminating the need for wired connections or network cables, enabling rapid network infrastructure deployment.
WiFi connection is used for the fastest Internet connection and sharing connections with wireless devices. Currently, WiFi is using the IEEE 802.11 connection standard, installed on most smart electronic devices, with an increasing number of applications being developed based on this connection standard.
Principles of WiFi Operation
The Internet network is transmitted by ISPs (Internet Service Providers) to a digital signal decoder (Modem), through a router or commonly known as a WiFi router, converting wired signals into wireless connections and delivering them to wireless mobile devices through WiFi connection standards.
Wireless devices receive WiFi signals through a signal converter device called an Adapter (WiFi card) installed directly on the devices. The wireless signal will be decoded directly on the device, from which users can directly access the Internet as usual.
To better understand the operational principle of WiFi, please refer to the diagram below
Some Common WiFi Connection Standards
802.11a Standard: Operating at 5 GHz frequency with a processing speed of 54 Mbps
802.11b Standard: Operating at 2.4 GHz frequency with a processing speed of 11 Mbps, known as the weakest connection standard
802.11g Standard: Operating at 2.4 GHz frequency with a processing speed of 54 Mbps
802.11n Standard: Operating at 2.4 GHz frequency with a processing speed of 300 Mbps
So, what distinguishes 2.4 GHz from 5 GHz?
Essentially, lower frequencies transmit signals over longer distances. Therefore, the 2.4GHz WiFi standard reaches devices at greater distances. However, its transmission speed is not comparable to that of the 5GHz frequency. Users will choose the appropriate connection standard based on their usage needs.
Various WiFi security methods
Aside from the commonly used security feature, AES (Advanced Encryption Standard), WiFi is also secured by WPA or WPA2 passwords aimed at ensuring access security for WiFi systems. WPA2 was developed to replace the outdated and easily decrypted WEP system. With these features, while not entirely secure against all forms of attacks, users can still use WiFi with confidence as decoding these security standards is extremely complex.
WiFi is a common connection standard. Understanding more about WiFi will help you access more applications that use this connection standard. You can also change your home or office WiFi password with more complex security principles to ensure the safety of your network system. Each modem has different ways to change the WiFi password, and you need to understand how to use it correctly to avoid misconfigurations.
