Historical
IEEE 802.3as-2006
Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
Amendment 3: Frame format extensions. This amendment to IEEE Std 802.3-2005 extends the IEEE 802.3 basic frame format with the addition of an envelope frame to accommodate additional prefixes and suffixes required by higher layer encapsulation protocols such as those defined by IEEE 802.1 (e.g., Provider Bridges, MAC Security), ITU-T or IETF (e.g., MPLS).
Institute of Electrical and Electronics Engineers [ieee]