Wireless Sensor Network (WSN) has gained enormous popularity since it is a base of an Internet of Things and applied in many areas of application. However, this network suffers an energy constraint issue which has to be tackled. Medium Access Control (MAC) manages the radio communication of transmitter and receiver, which is the highest energy consumed of sensor nodes. Therefore, many researchers have been proposed new MAC protocols to overcome this limitation. This paper explores and compares several MAC protocols for clustering WSN. Clustering network has a different characteristic since it classifies nodes as Cluster Heads and Cluster Members. This leads to a unique approach in developing MAC to enhance the network's performance.