In an effort to optimize WLAN performance, ABC Company has upgraded their WLAN infrastructure from
802.11a/g to 802.11n. 802.11a/g clients are still supported and are used throughout ABC's facility. ABC has always been highly security conscious, but due to budget limitations, they have not yet updated their overlay WIPS solution to 802.11n or 802.11ac.
Given ABC's deployment strategy, what security risks would not be detected by the 802.11a/g WIPS?