In HTIP, the ___ port is a special domain edge port, and its role on CIST is Root Port.

Question

Options

• AMaster
• B
• C
• D

• A
  75% (36)
• B
  2% (1)
• C
  17% (8)
• D
  6% (3)

Explanation

Option A, Master, is correct because in MSTP (Multiple Spanning Tree Protocol) - and Huawei's implementation referred to here as HTIP - the Master port is a special type of boundary port that sits at the edge of an MST region and connects the regional root to the rest of the Common and Internal Spanning Tree (CIST). Its defining characteristic is that, from the CIST's perspective, it acts as a Root Port, meaning it carries the best path toward the CIST root bridge. No other port role combines the domain-edge position with a Root Port role on the CIST simultaneously. Since options B, C, and D are not provided in this question, they represent absent or invalid alternatives with no competing definition to evaluate.

Memory tip: Think of the Master port as the "gateway to the root" - it is the one port on a regional root bridge that steps outside the region and faces the CIST root, so the CIST naturally sees it as a Root Port.

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