WiFi ( Wireless Fidelity ) is a wireless networking technology that connects devices to the Internet or local networks via radio. It is based on the IEEE 802.11 standard and uses high-frequency radio waves for data transmission.

 

Main features of WiFi:

• Wireless connection → Replaces network cables with radio transmission.
• Different frequency bands → Mainly 2.4 GHz (longer range but slower) and 5 GHz (faster but shorter range).
• High data rates → Depending on the standard (e.g. WiFi 6: up to 9.6 Gbit/s).
• Encryption → Security through WPA2, WPA3 and other protocols.
• Global usage → Widely used in homes, businesses and public places.

 

WiFi-Standards (IEEE 802.11):

• WiFi 4 (802.11n) → Up to 600 Mbps
• WiFi 5 (802.11ac) → Up to 3.5 Gbit/s
• WiFi 6 (802.11ax) → Up to 9.6 Gbit/s, better for many devices
• WiFi 6E → Expansion to the 6 GHz band for less interference
• WiFi 7 (in development) → Even faster and more stable connections

WiFi is often compared to GSM, LTE or 5G, but it is mainly intended for local use (e.g. home networks, offices), while cellular technologies are used for long distances .