WLAN Building Blocks
Let’s examine the building blocks of an 802 WLAN. The 802.11 WLAN consists of a set of services that are defined as architectural artifacts, independent of implementations and layers. The services are achieved by messages between the entities, mainly the STA/client, the APs, and the distribution system. In turn, messages are composed of frames.
As discussed previously, the 802.11 architecture consists of essential services implemented by the STAs, APs, and the distribution system. Table 4-1 shows the essential services, the specification that defined the services, and the entity that implements the services. The services implemented by the APs and STAs are collectively known as station services (SS), and the services ...