Which method enhances network reliability by allowing redundant paths?

Link Aggregation is a method that enhances network reliability by utilizing multiple physical links to create a single logical connection between devices. This redundancy means that if one of the physical links fails, traffic can still flow through the remaining links without interruption. By aggregating bandwidth across these connections, link aggregation also allows for increased throughput and better performance under high traffic conditions.

This method is particularly valuable in scenarios where network availability is crucial, such as in enterprise environments where a reliable connection is needed to support critical applications and services. It effectively protects against single points of failure and ensures continuous network functionality.

The other options do not provide the same level of redundancy and reliability. Trunking is focused on the ability to carry multiple VLANs over a single link, but it does not inherently provide redundancy. Traffic Load Balancing distributes traffic across multiple paths to optimize resource usage and prevent bottlenecks, but it does not establish backup paths that offer failover capabilities. Quality of Service (QoS) manages traffic to ensure the performance of specific applications but does not address the concept of providing redundant paths to enhance network reliability.