This document summarizes a research article that analyzed the performance of three MAC layer protocols (IEEE 802.11, IEEE 802.15.4, and TDMA) in a wireless sensor network considering the effects of the hidden node problem. Six performance metrics were evaluated: goodput, throughput, packet delivery ratio, residual energy, average delay, and node lifetime. The results showed that TDMA provided the best energy conservation and highest delay, while IEEE 802.11 gave the best throughput and goodput as well as lowest delay. IEEE 802.15.4 and TDMA were better than IEEE 802.11 at mitigating the hidden node problem.