Nowadays, the majority of people use network without cable. It is convenient form of connection. Router stays (for example) on the top of cabinet and users can use it anywhere in the house. How is it possible? It is the topic of this article. I would like to present wireless AP called an access point. It is a device which provides for hosts access to the computer network via wireless transmission medium (radio waves). The access point is usually a bridge between wireless local area network (WLAN) and local area network (LAN). Therefore, the access point must have at least two network interfaces: wireless which operates basing on the IEEE 802.11 standard (Wi-Fi) and wired used for combining PD network IEEE 802.3 (Ethernet) and standard modem or DSL. Today, most access points are equipped with DHCP server, network hub and the router acting as the gateway. Some models are additionally equipped with USB interface, enabling the connection and then sharing e.g. printer (yes, router can replace printer server). The access point as any wireless device has limited range. For some models, you can increase the range using external antennas. However, you are chooing an antenna you have to take into account the location (inside or outside). Because of low bandwidth (compared to wired networks) further limitation of the use of access points is the number of hosts which can be handled. Although the standard does not specify the quantity, but for the smooth operation of the network, we can assume the maxim number of stations as 30 (for 802.11a and 802.11g standards) or 10 (802.11b).