Software-defined networking（SDN）technology is an approach to（71）management that

Enables dynamic，programmatically efficient network configuration in order to improve network

performance and monitoring，in a manner more akin to（72）computing than to traditiona1 network

management，SDN architectures decouple network control and forwarding functions，enabling the

network control to beconediret1y（73）and the underlying infrastructure to be abstracted

From applications and network services.SDN was commonly associated with the（74）protocol

Since the protocol's emergence in 2011.When using an SDN based mode1 for transmitting

Multimedia traffic，an important aspect to take account is the（75）of Experience（QoE）

estimation，To estimate the QoE，first we have to be able to classify the traffic and then

it's recommended that the system can solve critical problems on its own by analyzing the

traffic.