A customer purchases a new 802.11n router for their home. They connect it to their current
801.11g devices, as well as their new laptop. Even though the laptop has a built-in 802.11n
antenna, they are not noticing any speed increase. Which of the following is the MOST likely
cause?

A.
The laptop is not close enough to the router.

B.
The router should be set to “G-Only”.

C.
The router is broadcasting in Mixed Mode.

D.
The laptop needs a dedicated access point.

Explanation:
http://www.mahalo.com/answers/what-does-mixed-mode-on-a-wireless-router-mean-1