Certified Wireless Network Administrator (CWNA) Practice Test

Sharing an SSID between 802.11n (HT) access points and 802.11g (ERP) access points in a single channel architecture (SCA) WLAN can lead to confusion for client stations regarding the capabilities of the available access points. When client devices connect to a network with a shared SSID, they might not differentiate effectively between the two types of access points.

As a result, client stations would perceive two different sets of access point capabilities. The 802.11n access points support higher data rates, improved performance, and potentially more advanced features such as multiple input multiple output (MIMO) technology, while the 802.11g access points do not. This inconsistency can lead to suboptimal performance, as devices may connect to a slower access point not suited for their capability, thereby hindering the overall effectiveness of the WLAN.

Avoiding a shared SSID ensures that client devices can clearly select the access point that matches their capabilities and operational needs, leading to better performance and resource utilization across the network.