WLAN stands for ‘Wireless Local Area Network’, which is a wireless local network, and refers to a local radio network that wirelessly connects devices such as smartphones, tablets, or laptops to the internet or network resources. It enables internet access without physical cable connections.
Functionality
Wireless networks use electromagnetic waves in the microwave range to transmit data between a router and connected end devices. Communication takes place over frequency bands, mainly at 2.4 GHz or 5 GHz. The router receives the internet signal via a telephone or internet connection and forwards it wirelessly to the connected devices. Data is also sent in reverse from the end device to the router and then forwarded to the internet.
Distinction between WLAN and Wi-Fi
Although the term Wi-Fi is often used synonymously, it is actually a brand name that has entered general English usage: Wi-Fi is a trademark of the Wi-Fi Alliance. Wi-Fi is thus a specific implementation of WLAN that guarantees device compatibility.
Security
Public WLAN networks, such as those in buses and trains, offer convenience but pose security risks. Data can be intercepted by unauthorized parties. To prevent this, users should use VPNs (Virtual Private Networks) to encrypt their data traffic and avoid sensitive activities such as online banking.
