simulation because it is easy to overload servers using lesser workload. On the other hand, dual cores CPUs are adequate for the evaluation of resource management related to algorithms which are designed for multicore CPU architecture.

Network Behaviour Modeling
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CloudSim \[28\] simulation framework supports the modeling of realistic networking topologies and models. For internetworking cloud entities such as hosts, data centers and connected end users are based on the conceptual networking abstraction model. This model is based on a latency matrix instead of actual network devices like routers and switches. CloudSim is an event based simulation framework, event management engine of CloudSim which maintains a latency for transmitting messages within the cloud entities. The number of network nodes are stored in a topology description table in BRITE \[31\] format. These nodes represent all CloudSim entities including hosts, data center, and cloud brokers. BRITE information is loaded every time during CloudSim initialization and is used for generating latency matrix.

Workload Characterization
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Workload traces form the Real system are acceptable for evaluation a simulation. Workload data has been taken from PlanetLab \[29\] which is a part of CoMon \[30\] project. During a random period of ten days, the Workload traces 