Date Added: Aug 2012
A Mobile Ad hoc NETwork (MANET) is a wireless network that does not rely on any fixed infrastructure (i.e., routing facilities, such as wired networks and access points), and whose nodes must coordinate among themselves to determine connectivity and routing. The traditional way of protecting networks is not directly applicable to MANETs. Many conventional security solutions are ineffective and inefficient for the highly dynamic and resource-constrained environments where MANET use might be expected. Since prevention techniques are never enough, Intrusion Detection Systems (IDSs), which monitor system activities and detect intrusions, are generally used to complement other security mechanisms.