Mobile Ad-hoc network is a system of wireless mobile nodes which are self-organized dynamically. As node is frequently moving in any direction so such type of network is temporary network. Such type of network may destroy if node goes out of range. So to maintain the existence of such type of network specific topology required. So that any dynamic changes is occurred in position of node then whole network will updated which will prevent the network goes down.In MANET Ad-hoc routing protocols play important role to maintain the network in small area. Some important Ad-hoc routing protocols are as AODV, DSDV, DSR and AOMDV.