The book describes step by step the process of building a wireless local network: from selecting the necessary equipment to connecting computers to the network. Technical nuances concerning all aspects of the functioning of a wireless network are presented in accessible and simple language; cases of increased complexity are considered: long-distance communications and networks with multiple access points. Sufficient attention is paid to working in public wireless networks. The author gives valuable advice on setting up a computer and mobile devices to work with a wireless network in almost all widespread operating systems, and also tells how to troubleshoot possible problems. The book is intended for beginners or existing users of the Internet and local networks.