  Wireless ad hoc networks have gained lots of attention due to their ease and
low cost of deployment. This has made ad hoc networks of great importance in
numerous military and civilian applications. But, the lack of centralized
management of these networks makes them vulnerable to a number of security
attacks. One of the attacks is packet drop attack, where a compromised node
drops packets maliciously. Several techniques have been proposed to detect the
packet drop attack in wireless ad hoc networks. Therefore, in this paper we
review some of the packet drop attack detection techniques and comparatively
analyze them basing on; their ability to detect the attack under different
attack strategies (partial and or cooperate attacks), environments and the
computational and communication overheads caused in the process of detection.
