Sometimes people say that Wi-Fi is freedom. They can connect to Internet from their own home, office or a hotel room. It is possible without using any wires. Furthermore, wireless LAN is much faster than the modem connection. Of course our computer must be in range of the base station. Using different amplifiers we can easily change our location within a large area. Wireless LAN is a great solution of office networks. People can save on hardware and cables and it is also quite easy to move computers within the range of the base station (workers can take their laptops to conferences; when the range is big enough, they can sometimes use the computers at home). It can be used also in home business, in hotels, travel offices, shops, libraries, schools, etc. WLAN is can also be used as a home network, when we have a computer in an office room, in the kitchen and in a children's room. We would be able to look for cooking recipe in the net without leaving the kitchen. It would be possible for our children to use their own computer for preparing school projects while sitting in their room. We could share files, printers and even play multiplayer games, and that would save some money on hard disks or peripherals. Wireless LANs do not cause trouble to administrators because they are as simple in management as the wired networks. At the same time we eliminate the possibility of destroying the wires. The installation and scaling are very simple.