802.1D The original STP standard, which provided a loop-free topology in a network with redundant links. Also called Common Spanning Tree (CST), it assumed one spanning tree instance for the entire bridged network, regardless of the number of VLANs. The updated version of the standard is IEEE 802.1D-2004.
802.1s The IEEE STP standard defined for Multiple Spanning Tree Protocol (MSTP). It maps multiple VLANs into the same spanning tree instance.
802.1w The IEEE STP standard for Rapid Spanning Tree Protocol (RSTP), which is an evolution of STP that provides faster convergence than STP.
802.3ad See Link Aggregation Control Protocol (LACP).
access layer The layer in the three-layer hierarchical network model that describes the portion ...