Exam N10-009 Topic 3 Question 85 Discussion

Actual exam question for CompTIA's N10-009 exam
Question #: 85
Topic #: 3
Which of the following devices functions mainly at the data link layer of the OSI model and is used to connect a fiber-optic cable to a network interface?

Suggested Answer: C Vote an answer

An SFP (Small Form-factor Pluggable) transceiver is a modular device that provides the interface between fiber-optic or copper cabling and the networking equipment (e.g., switch or router). It operates primarily at Layer 2 (Data Link), converting optical or electrical signals into frames usable by the network device.
A . SC is a fiber connector type, not the transceiver.
B . DAC (Direct Attach Copper) is a passive copper cable assembly with fixed transceivers, not a general-purpose module.
D . Twinaxial cable is a copper medium, not an interface device.
Reference (CompTIA Network+ N10-009):
Domain: Networking Concepts - Transceivers (SFP, GBIC, QSFP), fiber connectivity, OSI model mapping.

by Marlon at Apr 14, 2026, 05:50 AM

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