International Journal of Advance Research in Science and Engineering (IJARSE)
WSN is a communication network of sensor nodes and node gathers information about physical information. Denial of Service (DoS) is an attempt to make a machine/network resource unavailable to its intended users. Dos attack generally consist of efforts to temporarily suspend services of host connected to internet. Many protocols developed to protect against Dos, but it is not completely possible. One of such Dos attack is a vampire attack. Vampire attack is a resource exhaustion attack at the routing protocol layer which disables network by consuming more battery power. Vampire attack can be carried out in two different forms such as stateless protocol and state full protocol. This attack does not belongs to any specific protocol but depend on properties of many classes of routing protocol such as link state, distance vector and so on.