Question

Assume that a newly-installed 802.11ac access point has six
antennae. Assume further that three clients are connected to the AP
and that all have 802.11ac wireless network interfaces with 2
antennae and are streaming the same high-definition movie. Assuming
that the AP allocates two streams per client and uses 160 MHz wide
subchannels, which of the following is the best case estimate of
the aggregated effective data transmission rate from AP to all
clients?

a) 1.56 Gbps

       
b) 5.202 Gbps

       
c) 1.689 Gbps

       
d) 3.378 Gbps

       
e) 2.601 Gbps

       
f) 2.25 Gbps

Answer 1

For 802.11ac

Speed of 2 streams 160 Mhz channel =~ 1200 Mbps

=> for 3 clients:

=> speed = 1200 * 3 = 3600 Mbps = 3.51 Gbps

As this is approx speed, So correct answer is d 3.378 Gbps