You're tasked with designing a network topology for a large enterprise. How would you ensure efficient routing and switching to accommodate high traffic volume and ensure redundancy?

Option 3 provides a key strategy for ensuring efficient routing and switching in a large enterprise network by implementing redundant links. This helps in load balancing, minimizing downtime, and ensuring redundancy, which are crucial for handling high traffic volume and maintaining network reliability. Using VLANs (Option 1) is important for network segmentation but may not directly address redundancy and high traffic volume concerns. Dynamic routing protocols (Option 2) aid in efficient route selection but may not specifically focus on redundancy. Quality of Service (Option 4) is crucial for traffic prioritization but does not directly address routing and redundancy concerns.