What does EtherChannel do?

EtherChannel is a technology used in networking to aggregate multiple physical links between switches into a single logical interface. This bundling enables increased bandwidth and provides redundancy. When multiple links are combined, the logical link functions as if it were a single high-bandwidth link, effectively distributing traffic across the physical links.

By using EtherChannel, network performance can be enhanced as the combined capacity of the individual links supports higher data rates, reducing the chances of a bottleneck. Additionally, if one of the physical links fails, the remaining operational links in the EtherChannel can continue to carry traffic, promoting network resilience.

The other options describe different concepts that do not accurately reflect the function of EtherChannel. For instance, increasing the power of individual switch ports, isolating traffic for security, or converting data types are unrelated to the fundamental purpose of EtherChannel, which is focused on link aggregation and bandwidth optimization.