IEEE Std 802.1D specifies the operation of MAC Bridges, which interconnect IEEE 802 Standard Local Area Networks (LANS). To implement correction, of both editorial and minor technical nature, to IEEE Std 802.1D. Revision Standard - Superseded. The concept of Media Access Control (MAC) Bridging, introduced in the 1993 edition of this standard, has been expanded to define additional capabilities in Bridged LANs aimed at providing for expedited traffic capabilities, to support the transmission of time-critical information in a LAN environment; and providing filtering services that support the dynamic use of Group MAC Addresses in a LAN environment.