A Review of Open Flow Protocol in Software-defined Network

In recent years network traffic has been increasing rapidly beln recent years network traffic has been increasing rapidly because of the usage of a lot of online applications and cloud services using mobile devices. Then the collection of data formats, online devices and service types are needed to manage the network. Further, the network operators need to ensure availability of service and its quality and security. All this should be done without any increase in the cost of operation and equipment. Nowadays, Software-defined networking (SDN) has attracted more attention in IT and research fields. And, Open Flow (OF) is one of the first SDN standards which helps the SDN controller communicate directly with the data plane of network devices such as switch and router, which can be either physical or virtual [1]. This paper, first outlines the basic principles of SDN and open flow and also explains the features which are supported by different versions of open flow protocol.