“…This survey is motivated by the realization that SDN tends to be a feasible alternative for IoT network architectures that ✓ ✓ ✓ OpenFlow (OF), NFV, Middleware [20] ✓ ✓ OF, NFV, Middleware [21] ✓ ✓ ✓ NFV [22] ✓ NFV [23] ✓ ✓ ✓ NFV, Middleware [24] ✓ ✓ ✓ ✓ NFV, OF [25] ✓ NFV, OF [26] ✓ Middleware, OF [27] ✓ ✓ ✓ Middleware, NFV [28] ✓ ✓ ✓ Blockchain [29] ✓ ✓ ✓ Blockchain [30] ✓ ✓ ✓ Middleware [31] ✓ ✓ Middleware [32] ✓ Middleware [33] ✓ Middleware, NFV [34] ✓ ✓ Blockchain [35] ✓ ✓ Blockchain [36] ✓ ✓ ✓ ✓ Blockchain [37] ✓ ✓ ✓ Blockchain [38] ✓ ✓ OF [39] ✓ Blockchain [40] ✓ Blockchain [41] ✓ Blockchain [42] ✓ ✓ NFV [43] ✓ Middleware [44] ✓ ✓ Blockchain [45] ✓ Blockchain [46] ✓ ✓ Blockchain [47] ✓ ✓ NFV, OF [48] ✓ NFV, OF [49] ✓ ✓ Edge Computing, NFV [50] ✓ NFV [51] ✓ NFV [52] ✓ NFV, Blockchain [53] ✓ ✓ Blockchain [54] ✓ ✓ NFV [55] ✓ ✓ Blockchain [56] ✓ ✓ ✓ NFV, Middleware [57] ✓ ✓ ✓ Middleware, Blockchain [58] ✓ ✓ ✓ Blockchain,NFV [59] ✓ ✓ ✓ NFV, Middleware, Blockchain [60] ✓ ✓ ✓ ✓ NFV, Middleware [61] ✓ ✓ ✓ ✓ ✓ NFV, Middleware,Blockchain Our Survey ✓ ✓ ✓ ...…”