Lan and Wlan

Lan noun - A local computer network for communication between computers; especially a network connecting computers and word processors and other electronic office equipment to create a communication system between offices.

Wlan and lan are semantically related. In some cases you can replace term "Wlan" with "Lan", this nouns are similar.

Wlan noun - A local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet; uses ethernet protocol.

Lan and wlan are semantically related. You can use "Lan" instead a noun "Wlan".