The characteristics of the power industry transmission backbone network include (). (Multiple Choice)

Question

Options

• ASDH is used at the same level Network construction over OTN
• BDifferent levels of transmission networks are independent of each other
• CNetworks at different levels are connected to form a flat network
• DThe same layer transmission network SDH backbone network and OTN backbone network

• A
  100% (18)

Explanation

All four options accurately describe the architectural characteristics of the power industry's transmission backbone network. Option A is correct because OTN (Optical Transport Network) serves as the physical transport layer, with SDH (Synchronous Digital Hierarchy) networks built on top of it at the same hierarchical level - OTN provides the wavelength capacity that SDH circuits ride over. Option B is correct because different network tiers (e.g., national, provincial, regional) are managed and operate independently, improving fault isolation and resilience. Option C is correct because, despite this independence, cross-level interconnections exist so that together they form a unified, relatively flat end-to-end topology rather than a strictly siloed hierarchy. Option D is correct because within the same network tier, both SDH backbone rings and OTN backbone rings coexist, serving different traffic types and capacity needs simultaneously.

Memory tip: Think of the power grid backbone as a layered cake with bridges - each layer (tier) is baked independently (B), OTN is the base flour that SDH is mixed into at each layer (A & D), and the bridges between layers flatten the whole structure into one accessible network (C).

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