What is a characteristic of data flow processing in SDN?
- The SDN controller attaches an entry to each packet to identify the flow.
- The SDN controller routes a data flow first and the data plane will use policies to permit or deny the flow.
- Each data flow through the network must be approved by the SDN controller first.
- OpenStack is used to construct the entry in switches to facilitate data forwarding.
Explanation: In SDN architecture, each data flow through the network must first get permission from the SDN controller. If the controller allows a flow, it computes a route for the flow to take and adds an entry for that flow in each of the switches along the path. Communication between the controller and the switches typically uses an open standard protocol and an API, such as OpenFlow.
Exam with this question: CCNA 3 v7 Module 13 Quiz - Network Virtualization
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