Distributed Queue Dual Bus (DQDB), defined by IEEE 802.6, is a standard primarily intended for which type of network?

Introduction / Context: DQDB (Distributed Queue Dual Bus) was developed to support metropolitan-scale networks with shared medium access and quality of service considerations across city-wide areas.

Given Data / Assumptions:

• Standard: IEEE 802.6.
• Topology: dual unidirectional buses.
• Scope: metropolitan coverage.

Concept / Approach: MANs bridge the gap between LAN (local building/campus) and WAN (long haul). DQDB’s dual-bus design and distributed queueing aim to coordinate access across multiple nodes over metropolitan distances.

Step-by-Step Solution:

Verification / Alternative check: Historical references consistently list DQDB under metropolitan technologies, not LAN/WAN categories.

Why Other Options Are Wrong:

Common Pitfalls: Assuming any IEEE 802 technology is LAN-only; overlooking the MAN category.

Final Answer: MAN.