RCDD Question #181: Real Exam Question with Answer & Explanation

The correct answer is A. Star. When each CATV outlet runs an individual cable back to a telecommunications room, and each TR connects to the headend, the resulting layout is a star topology. Each device has a dedicated home run path to a central point.

Question

A building has a series of CATV outlets each with cables installed back to a telecommunications room (TR), and each telecommunications room (TR) is connected to the headend. What is this type of topology called?

Options

AStar
BMesh
CBus
DSeries

Explanation

When each CATV outlet runs an individual cable back to a telecommunications room, and each TR connects to the headend, the resulting layout is a star topology. Each device has a dedicated home run path to a central point.

Common mistakes.

B. Mesh topology requires multiple redundant interconnections between nodes, not dedicated individual runs to a single central point.
C. Bus topology uses a single shared cable backbone that all devices tap into along its length, which is not the case here.
D. Series (daisy-chain) topology connects devices sequentially one after another on the same cable, not individually back to a central room.

Concept tested. CATV distribution star topology identification

Reference. https://www.bicsi.org/education-certification/education-@-bicsi-learning-academy/technical-references/tdmm

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