The paper presents current state of IEEE 802.11 wireless networks in several Belgrade neighbourhoods. Measurements were performed and detected wireless networks were classified according to the type of wireless security (encryption) used on MAC layer of IEEE 802.11 standard. Market share of specific manufacturers of wireless equipment is estimated. Correlation of gathered results and type (manufacturer) of wireless equipment detected, as well as the estimated level of user configuration implemented is investigated. It was noted that the security level of wireless networks is relatively good and presents an improvement over security of older networks in Belgrade, although still about 40% of analyzed wireless networks use compromised security (WEP) or do not use encryption at all.
