Internet of things(IoT) is the system which interrelates different computational devices, digital machines, mechanical machines and they have been bestowed with unique identifier having the talent to send data over a interconnection of networks which does not require interactions between human and human or machine and mankind. In this manuscript we have discussed about the different communication protocols. Moreover, the usefulness of IoT in the recent research and development is also elaborately discussed. Smart environment and antenna design which are basic and important necessity of communication protocols is also included.