Wireless networks are most appealing in terms of deployment over a wide range of applications. The key areas are disaster management, industrial unit automation and battlefield surveillance. The paper presents a study over inter-operability of MANET (Mobile Ad-Hoc NETwork) protocols i.e. DSDV, OLSR, ZRP, AODV over WSN (Wireless Sensor Network). The review here covers all the prevailing protocol solutions for WSN and deployment of MANET protocols over them. The need of moving to MANET protocols lie in situation when the authors talk about mobile sensory nodes which are a compulsion when they talk about the above mentioned three areas. However, the deployment may not be limited to these only.