URL：https://www.researchgate.net/publication/329410780/figure/fig2/AS:700307705188356@1543977776872/SDN-architecture-The-SDN-network-architecture-has-three-tiers-the-application-tier-the.png
掲載元：https://www.researchgate.net/figure/SDN-architecture-The-SDN-network-architecture-has-three-tiers-the-application-tier-the_fig2_329410780
