RCDD Question #96: Real Exam Question with Answer & Explanation

The correct answer is A. Horizontal cross-connect (HC). The Horizontal Cross-Connect (HC) in the TR is the defined point where backbone cabling terminates and is cross-connected to horizontal cabling serving work area outlets.

Question

In a telecommunication room (TR), the ________ is the facility used to make cross connections from the backbone cable to the horizontal cable.

Options

AHorizontal cross-connect (HC)
BEntrance facility (EF)
CIntermediate cross-connect (IC)
DMain cross-connect (MC)

Explanation

The Horizontal Cross-Connect (HC) in the TR is the defined point where backbone cabling terminates and is cross-connected to horizontal cabling serving work area outlets.

Common mistakes.

B. The Entrance Facility (EF) is the point where outside plant cabling and service provider infrastructure enters the building - it is not involved in backbone-to-horizontal cross-connection.
C. The Intermediate Cross-Connect (IC) connects first-level backbone to second-level backbone cabling between the MC and HC tiers and does not directly terminate horizontal distribution cables.
D. The Main Cross-Connect (MC) serves as the top-tier termination for campus backbone cabling and does not interface with horizontal cabling serving individual work areas.

Concept tested. Horizontal Cross-Connect role in TR cabling hierarchy

Reference. https://www.tiaonline.org/standard/tia-568/

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