What is the main benefit of using EtherChannel?

The main benefit of using EtherChannel is increased bandwidth. EtherChannel allows the aggregation of multiple physical Ethernet links into a single logical link, effectively combining their bandwidth. This means that instead of a single connection with a limited capacity, you can utilize several connections simultaneously, thus increasing the overall throughput between switches or devices.

By using EtherChannel, network administrators can achieve greater bandwidth without needing to overhaul the existing infrastructure, making it a scalable solution. This technology also helps in load balancing traffic across the aggregated links, ensuring that no single link is overwhelmed while others are underutilized.

Other options like enhanced security and simplified routing are not the primary purposes of EtherChannel. While using multiple links can provide some redundancy, the focus is primarily on maximizing bandwidth and improving link utilization. Reduced complexity might be a possible benefit in certain contexts, but EtherChannel primarily targets the enhancement of bandwidth, making it a vital consideration for networks that require high availability and performance.