Abstract: Today’s Cloud data centers consist of thousands of physical machines (PMs)including large number of computing, storage devices and network resources for the cloud applications are hosted in numerous networked Virtual Machines which are subjugated by complex applications including numerous computing and data modules with solid correspondence correlations between them. Out of these resources, network resources uphold adding complexity and claim for scalability and elasticity. Thus Virtual Machine Placement (VMP) demands a critical discussion in present scenario. Hence, proper VM placement helps to achieve energy efficiency via reduce the CO2 emission to ensure a green computing environment for eco friendly. This paper evaluates the literature on network-aware Dynamic VM placement in cloud data centers.