1. Basic Service Set (BSS) :
Basic Service Set (BSS), as name suggests, is a group or set of all stations that communicate with each together. Here, stations are considered as computers or components connected to wired network.
2. Extended Service Set (ESS) :
Extended Service Set (ESS), as name suggests, is a group of BSSs or one or more interconnected BSS along with their wired network.
Difference between BSS and 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.|