CWNA Wireless Network Administrator

Answer - C - A cell overlap of 15 to 20 percent is typically needed for seamless roaming.

Key Takeaway: Seamless roaming allows mobility in a wireless network. The handover from one access point to another occurs in milliseconds. The data intended for delivery to the station that has roamed to a new access point might still be buffered at the original access point. Most vendors recommend cell overlap of 15 to 20 percent to achieve successful seamless roaming.