With our growing reliability on distributed networks, the security aspect of such networks becomes of prime importance. In large scale distributed networks it becomes cardinal to have an efficient and effective monitoring scheme. The monitoring schemes supervise the node behaviour in the network and look out for any discrepancy. Monitoring schemes comprise of monitoring components that work together to help schemes in meeting various security requirement parameters for the networks. These security parameters are breached via various attacks by manipulation of monitoring components of particular monitoring schemes to produce faulty results and thereby reducing efficiency of networks, reliability and security. In this paper we have discussed these components of monitoring, multiple monitoring schemes, their security parameters and various types of attacks possible on these monitoring components by manipulating assumptions of monitoring schemes.