document: Networking without wires Several types of devices use radio transmitters to send data over thin air . Are WLANs , wireless local area networks , the end to all cables ? Will Dalrymple weighs up the costs and benefits
doc_bio_tags: O O O O O O O O O O O O O O O O O O O O B I I I O O O O O O O O O O O O B O B
extractive_keyphrases: wireless local area networks costs benefits