Research Article
A Trusted Remote Data Trading Scheme in Hybrid SDN for Intelligent Internet of Things
Table 1
Comparison of hybrid SDN networking models.
| Networking model | SDN components | Protocol conversion | Communication scope | Scalability & robustness |
| Networkwide SDN | Controller/switches/nodes | N/A | SDN internal | Impacted by SDN controller performance | SDN middleware | Controller/middleware/nodes | Middleware parsing protocol | At least one SDN device | Restricted by protocol parsing | SDN agent | Controller/legacy switches & agents/nodes | Agent parsing protocol | All nodes limited by agents | Limited by controller loads | Hybrid SDN | Controller/switches/gateways/legacy switches & routers/nodes | VLAN gateway | Networkwide | Dependent on network architecture |
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