220-801 Question #1191: Real Exam Question with Answer & Explanation

The correct answer is D: ST. The ST (Straight Tip) fiber connector uses a round bayonet-style barrel twist-lock mechanism, matching the description of a round barrel connection on a distribution panel.

Question

A technician needs to connect a fiber cable to a distribution panel that has a round barrel connection. Which of the following would be required?

Options

ASC
BLC
CBNC
DST

Explanation

The ST (Straight Tip) fiber connector uses a round bayonet-style barrel twist-lock mechanism, matching the description of a round barrel connection on a distribution panel.

Common mistakes.

A. The SC (Subscriber Connector) is a fiber connector with a square push-pull body, not a round barrel design.
B. The LC (Lucent Connector) is a small form-factor fiber connector with a rectangular latch mechanism, not a round barrel.
C. BNC (Bayonet Neill-Concelman) connectors are used with coaxial copper cable, not fiber optic cable.

Concept tested. ST fiber optic connector identification

Reference. https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/product_data_sheet09186a00801ef77b.html

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