Engineering
How Packet Switching Handles Congestion in Software-Defined Networks
Quick fact
In a software-defined network, the controller can dynamically reroute traffic based on real-time congestion measurements, something that is extremely difficult to achieve with traditional distributed routing protocols.
Why this is interesting
Imagine a city with traffic lights that can't see the whole road network, only their own intersection. What if a central brain could see every car and reroute traffic instantly to avoid gridlock? That's the idea behind software-defined networking.