Two companies successfully merge. Following the merger, a network administrator identifies a connection bottleneck. The newly formed company plans to acquire a high-end 400Gb switch and redesign the network from a three-tiered network model to a spine-leaf network model. Which of the following is the administrator attempting to enable?

The Virtual Router Redundancy Protocol (VRRP) is used for providing high availability by configuring virtual routers. While it enhances network reliability, it does not directly address load distribution across multiple connections or switches, making it unsuitable for resolving a connection bottleneck through traffic management.

Changing route selection metrics pertains to optimizing routing protocols and determining the best path for data packets. Although it can improve routing efficiency, it does not inherently balance load between multiple connections or devices, thus failing to directly tackle the identified bottleneck issue.

Link aggregation combines multiple network connections to increase bandwidth and provide redundancy. While it can help prevent bottlenecks by utilizing multiple links, it does not manage or distribute traffic loads across devices as effectively as a load balancer, which dynamically adjusts to traffic patterns.