What protocol is configured for the Dynamic EtherChannel as mentioned in the statement?

Dynamic EtherChannel is a feature that allows you to bundle multiple physical Ethernet links into a single logical link to increase bandwidth and provide redundancy. The protocol typically used to configure Dynamic EtherChannel is the Link Aggregation Control Protocol (LACP).

LACP is an IEEE specification (802.3ad) that enables the automatic creation of aggregated links by allowing devices to negotiate the bundling of links. When LACP is enabled on both ends of a link, it dynamically creates EtherChannel configurations, which can adjust to changes in the network configuration.

The other options do not pertain to the creation of Dynamic EtherChannel. Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP) are primarily used for preventing loops in Ethernet networks and are more focused on managing network topology rather than link aggregation. PAE, or Port Access Entity, relates to authentication protocols, specifically in relation to IEEE 802.1X for network access control, and is not relevant in the context of configuring EtherChannels. Therefore, LACP is the correct choice for establishing Dynamic EtherChannel configurations.