Wireless Local Area Networks (WLANs) have gained popularity over the past few years and deployment of WLANs (a.k.a. Wi-Fi networks) is expected to increase significantly in the near future. Currently, most of these networks are used for data access from laptops, PDAs etc. VoIP over WLAN (hereafter referred to as VoWLAN) too is expected to grow significantly in the near future. However, VoIP over WLAN presents a unique set of problems to be dealt with before this technology can become a reality. A significant part of these problems are related to providing Quality of Service (QoS) for real-time traffic like voice. We look at these issues in this paper. 802.11 is by far the most popular WLAN standards today and we concentrate our discussion to this standard.