Huawei Certified ICT Professional – Data Center Network (HCIP-DCN) — Question 27

Both the CIST and MSTI are calculated based on priority vectors, which are contained in MST BPDUs. Among the priority vectors that participate in MSTI calculation, which one has the highest priority?

Answer options

• A. Internal path cost
• B. External path cost
• C. ID of the root switching device
• D. Regional root ID

Correct answer: D

Explanation

The Regional root ID is the most significant priority vector in the MSTI calculation because it identifies the root of the region and influences the topology. In contrast, the internal and external path costs, as well as the ID of the root switching device, play lesser roles in determining the overall priority in this context.