text: All base stations in a wireless distribution system must be configured to use the same radio channel, method of encryption (none, WEP, WPA or WPA2) and the same encryption keys. They may be configured to different service set identifiers (SSIDs). WDS also requires every base station to be configured to forward to others in the system.
  WDS may also be considered a repeater mode because it appears to bridge and accept wireless clients at the same time (unlike traditional bridging). However, with the repeater method, throughput is halved for all clients connected wirelessly. This is because Wi-Fi is an inherently half duplex medium and therefore any Wi-Fi device functioning as a repeater must use the Store and forward method of communication.
  WDS may be incompatible between different products (even occasionally from the same vendor) since the IEEE 802.11-1999 standard does not define how to construct any such implementations or how stations interact to arrange for exchanging frames of this format. The IEEE 802.11-1999 standard merely defines the 4-address frame format that makes it possible.
  Technical
  WDS may provide two modes of  access point-to-access point (AP-to-AP) connectivity:
  Wireless bridging, in which WDS APs (AP-to-AP on local routers AP) communicate only with each other and don't allow wireless stations (STA, also known as wireless clients) to access them
  Wireless repeating, in which APs (WDS on local routers) communicate with each other and with wireless STAs
  Two disadvantages to using WDS are: