A company has all IEEE 802.11a/802.11g devices; however, its network administrator recommends installing 802.11n access points to provide greater performance. Which feature on an 802.11n AP provides better performance to legacy devices?
A. channel aggregation
B. transmit beam-forming
C. maximal-ratio combining
D. spatial multiplexing
BC is correct
transmit beam-forming increases performance for traffic from AP to the client.
maximal-ratio combining increases performance for traffic from the client to AP.
A: Clients need to support that feature
C: Only clients perform this feature
D: Clients need to support that feature
So only B: allows legacy non-802.11n Clients to profit from this feature