Wi-Fi, short for Wireless Fidelity, is a technology that allows devices to connect to the internet and communicate wirelessly within a local area network (LAN). Wi-Fi uses radiofrequency signals to transmit data between devices, eliminating the need for physical cables and enabling convenient wireless connectivity.
Here are key features and aspects of Wi-Fi:
- Frequency Bands: Wi-Fi operates in the 2.4 GHz and 5 GHz frequency bands. The availability of these bands depends on the Wi-Fi standard and regulatory rules in different regions.
- Wi-Fi Standards: Wi-Fi standards define the specifications for wireless communication. Common Wi-Fi standards include:
- 802.11b/g/n: Operates in the 2.4 GHz band.
- 802.11a/n/ac/ax: Operates in the 5 GHz band. The “ac” and “ax” standards offer higher data transfer rates and improved performance.
- Access Points (APs): These can be standalone routers or integrated into other devices like modems.
- Router: In a home or small office setup, a router often combines the functions of a modem and an access point. It manages the local network, assigns IP addresses to devices, and provides a connection to the internet.
- SSID (Service Set Identifier): The SSID is the name of a Wi-Fi network. Devices use the SSID to identify and connect to a specific network. SSIDs can be hidden for added security.
- Wi-Fi Alliance: The Wi-Fi Alliance is a global organization that certifies Wi-Fi products for interoperability. Devices with the Wi-Fi Certified logo ensure compatibility and adherence to industry standards.
- Range: The range of a Wi-Fi network depends on factors like the power of the transmitter, the presence of obstacles, and interference from other devices. Wi-Fi range extenders can be used to boost coverage.
- WPA3: The latest Wi-Fi security protocol, WPA3, enhances security features and provides stronger protection against various types of attacks.
Wi-Fi has become an essential part of daily life, offering flexibility and convenience in connecting devices to the internet. Its widespread adoption has made it a standard feature in homes, businesses, and public spaces around the world.
