ITPEC FE Morning October 2021 Question 34
Which of the following is an appropriate explanation of Software-Defined Networking (SDN) that uses OpenFlow?
Explanation
Separating data forwarding from network control — SDN puts the control in software and leaves the switches 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 (a)
Why not others:
- •(b) — analysing business processes with data flow and activity diagrams is business process analysis, not networking
- •(c) — RFID for optimising distribution 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
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.