1.基本服务集(BSS):
顾名思义,基本服务集(BSS)是一组或一组相互通信的所有工作站。在这里,站被视为连接到有线网络的计算机或组件。
2.扩展服务集(ESS):
扩展服务集(ESS),顾名思义,是一组BSS或一个或多个互连的BSS及其有线网络。
BSS和ESS之间的区别:
BSS | ESS |
---|---|
It is a wireless LAN being established using AP that centralizes access and control i.e. enables and allow access and control over all wireless devices. | It is mainly established by connecting more than one BSS. |
It contains only one or single AP (Access Point). Here AP is a device that is usually connected to a wired router, hub, or switch and allows it to function as a path for connecting to wireless device and thus creating Wireless Local Area Network (WLAN). | It contains more than one AP. |
BSS does not support mobility because it contains only one AP and therefore user cannot move freely from one place to another. | ESS supports mobility i.e. client or user can move from one place or location to another and can still be connected to LAN without any interruption. |
It provides short-range wireless communication. | It provides long range wireless communication. |
BSS has a smaller number of user than ESS. | ESS has a greater number of user than BSS. |
It is highly secure because of small range. | It is less secure than BSS because of wide range. |
In BSS, wireless devices are connected through AP. | In ESS, BSS are connected through distribution system. Here, distribution system connects more than one Aps to form ESS and thus provides wireless stations. |
BSS is easy process but rarely used. | ESS is more complex than BSS but is highly used. |