International Journal of Computer Networks and Applications (IJCNA)
A network is basically a combination of nodes and links. Nodes can be mobile or static in nature and similarly links connecting them may be wired or wireless in nature. So there can be different combination of network. In MANET all the nodes are mobile and these mobile nodes are not in a fixed topology. Each node can take and receive data from another node that is why these nodes can act as router as well as node. Nodes can join the network with their own wish. Due to all these features of MANET it may face various challenges like no central authority, different mobility models, battery power, selfish behavior of nodes, coordination of nodes and continuously maintenance of information which is required to properly route traffic.