IEEE 802.1D-1990
Standard for Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges
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About This Item
802.1D-1990 defines a technical framework for media access control (MAC) bridges in local and metropolitan area networks. It addresses how bridging devices forward traffic between network segments and helps establish consistent behavior in communication, networking and broadcast technologies. As a superseded standard, 802.1D-1990 remains relevant for understanding the early structure of bridged LAN operation and the requirements that shaped interoperable network design.
About 802.1D-1990
This standard,
802.1D-1990
, is part of the IEEE 802.1 family focused on bridging at the data-link layer. Its purpose is to describe how MAC bridges connect separate network segments while preserving orderly frame forwarding across a LAN or MAN environment. The specification is important for defining bridge behavior, addressing network segmentation, and supporting consistent communication between attached devices. In product and standards reference work, it is typically used to identify the technical basis for bridge-related requirements and conformance review.Where is 802.1D-1990 used?
802.1D-1990 is most closely associated with network equipment that implements MAC bridging, such as bridge units, switched network segments, and related LAN infrastructure. It is relevant in environments where traffic must move between interconnected local or metropolitan area network segments with predictable forwarding behavior. The standard may also be referenced in technical documentation for communication systems, network design records, and procurement specifications where bridging functions need to be clearly defined.
Importance in practice
In practice, 802.1D-1990 helps provide a common baseline for how bridging functions are described and evaluated. That makes it useful for compliance checks, equipment comparison, and design control when specifying network interconnection behavior. For organizations working with legacy or standards-based network documentation, it can reduce ambiguity around MAC bridge operation and support more consistent testing and procurement decisions. Because it is superseded, it is often consulted for historical context or compatibility review rather than current deployment planning.
- MAC bridge behavior
- LAN and MAN interconnection
- Frame forwarding rules
- Superseded IEEE 802.1 reference
- Publication Date: 1991
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Communication, Networking and Broadcast Technologies
- Official IEEE: Doi link
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- This Version: 802.1 (1991)
- Previous Version: 802.1 (1991)
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