ITPEC FE Morning October 2018 Question 35
Which of the following is an appropriate explanation of SDN (Software-Defined Networking) that uses OpenFlow?
Explanation
Separating data forwarding from route control — SDN puts the control in software and leaves specialised devices to forward.
In SDN the control plane, which decides where traffic goes, runs as software on a central controller, and the data plane is made of switches that only forward packets. OpenFlow is the protocol the controller uses to install forwarding rules (flow tables) in those switches, so the whole network can be reconfigured from software instead of device by device.
Answer (b)
Why not others:
- •(a) — analysing business processes with data flow and activity diagrams is business process analysis, not networking
- •(c) — RFID for optimising logistics networks is an IoT and supply-chain application
- •(d) — placing servers across the Internet to deliver content efficiently is a CDN (content delivery network)
Key rule: SDN splits the network into a software control plane and a forwarding data plane, and OpenFlow is the protocol between them.
Networks · AI-written, may contain errors
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