What does "Link Aggregation" primarily achieve in networking?

Link Aggregation is a technique used in networking that combines multiple network interfaces into a single logical interface. This serves two primary purposes: enhancing throughput and providing redundancy. By aggregating several physical connections, the total bandwidth available for data transmission increases, which can significantly improve network performance, especially in environments with high traffic loads.

Moreover, Link Aggregation also offers redundancy. If one of the links in the aggregated group fails, the remaining links can continue to carry traffic, thus maintaining network connectivity and reliability. This redundancy is crucial for keeping systems operational and minimizing downtime, which is a key aspect of robust network design.

The other choices do not accurately reflect the main benefits of Link Aggregation. Increasing network interface security is not a primary function of this technique; while security might be affected indirectly, it is not the focus. Enhancing wireless network performance is unrelated, as Link Aggregation is used primarily in wired networks. Reducing the number of connected devices does not pertain to Link Aggregation, since this technology focuses on combining existing interfaces, rather than limiting connections.