Wireless sensor networks are helpful in places where conventional networks cannot be thought of as feasible options as the former provide an economical, sensing and computable solution for the environments. The factor of reliability of data transport in the fields of wireless sensor networks is a one that has many sides and the layers concerned with it are the physical, network and transport layers. The authors are going to study the working of RMST protocol in this paper which would provide reasons for recommendation of this protocol at the transport layer in order to achieve the factor of reliability.