With the advances in wireless technologies and development of mobile devices, Mobile Ad hoc Networks have emerged as the milestone and play an important role in establishing communication using no fixed infrastructure. Nodes are free to move randomly and communicate with each other through single hop if within transmission range or through multiple hop beyond transmission range. Due to unpredictable behavior of such networks, it is difficult to maintain the required Quality of Service (QoS). QoS in MANETs refers to the provision of guaranteed services on the network layer, defined in the...