A. H Safari-Bavil - Department of Electrical and Computer Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran.
S. Jabbehdari - Department of Electrical and Computer Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran.
M. Ghobaei-Arani - Department of Computer Engineering, Qom Branch, Islamic Azad University, Qom, Iran.

Generally, the issue of quality assurance is a specific assurance in computer networks. The conventional computer networks with hierarchical structures that are used in organizations are formed using some nodes of Ethernet switches within a tree structure. Open Flow is one of the main fundamental protocols of Software-defined networks (SDNs) and provides the direct access to and change in program of sending network equipment such as switches and routers, physically and virtually. Lack of an open interface in data sending program has led to advent of integrated and close equipment that are similar to CPU in current networks. This study proposes a solution to reduce traffic using a correct placement of virtual machines while their security is maintained. The proposed solution is based on the moth-flame optimization, which has been evaluated. The obtained results indicate the priority of the proposed method.

Cloud Computin, Virtual Machine Placement, Software-Defined Networks, Moth-Flame Algorithm