With a 20-mW access point and 3-dBi loss for the cable, what is the approximate EIRP?

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When calculating the link budget for a wireless point-to-point bridge, the engineer notices that one antenna has its gain marked as 2.85 dBd.

With a 20-mW access point and 3-dBi loss for the cable, what is the approximate EIRP?
A . 15 dBm
B . 18 dBm
C . 22 dBm
D . 25 dBm

Answer: A