CWNA Wireless Network Administrator

Answer - B - To double the distance of a signal, you should increase the EIRP by 6 dB.

Key Takeaway: Equivalent Isotropically Radiated Power, or EIRP, is the highest RF signal strength that is transmitted from a particular antenna. It is the actual RF power as measured in the main lobe of an antenna. It is equal to the sum of the transmit power into the antenna in dBm. As a rule of thumb, if you double or halve the distance, then you should add or subtract 6 dB to the dBi gain of the antenna respectively.