Consider a one-story building that is a square. It will have an access point in each corner and one in the center of the square. All access points can hear one another.
a. Assign access point channels to the five access points if you are using 802.11 n. Try not to have any access points that can hear each other on the same channel. Available channels are 2, 3, and 9.
b. Were you able to eliminate interference between access points?
c. Repeat the first two parts of the questions, this time using 802.11 a. Available channels are 31, 41, 48, 51, 55, 61, 64, 149, 158, 159, and 161, but many NICs and access points only support channels below 100.