300-420 Question 307
Single answerAn enterprise network is implementing an SD-WAN solution that uses 'on-change publication' for route updates in its control plane. What is the primary advantage of using this method over periodic advertisements?
- A
Minimizes control-plane traffic by sending updates only when a change occurs
- B
Ensures that all devices in the network periodically refresh their routing tables
- C
Reduces the convergence time by sending updates at fixed intervals
- D
Simplifies configuration by using a default static update interval
Show answer and explanation
Correct answer: A
Explanation
On-change publication is an event-driven approach used in network protocols to optimize control-plane efficiency. Instead of sending routing updates periodically, this method sends updates only when a network change occurs. This reduces unnecessary traffic in the control plane and ensures that the network operates efficiently, especially in large-scale or dynamic environments like SD-WAN.
- A. Correct.
Correct. On-change publication minimizes control-plane traffic by sending updates only when there is a change in the network, such as a new route being added, removed, or modified.
- B. Incorrect.
Incorrect. On-change publication does not periodically refresh routing tables; it only sends updates when a change happens.
- C. Incorrect.
Incorrect. On-change publication does not reduce convergence time through fixed intervals. It triggers updates immediately when a change occurs.
- D. Incorrect.
Incorrect. On-change publication does not involve static update intervals; it is event-driven, not timer-based.