N10-005 Question #91: Real Exam Question with Answer & Explanation

The correct answer is D: RJ-11. The six-position plug and jack commonly used for telephone line connections may be used for RJ11, RJ14 or even RJ25, all of which are actually names of interface standards that use this physical connector. The RJ11 standard dictates a 2-wire connection, while RJ14 uses a 4-wire c

Question

Which of the following connectors are MOST commonly used on a POTS line?

Options

ARJ-45
BMTRJ
CDB-9
DRJ-11

Explanation

The six-position plug and jack commonly used for telephone line connections may be used for RJ11, RJ14 or even RJ25, all of which are actually names of interface standards that use this physical connector. The RJ11 standard dictates a 2-wire connection, while RJ14 uses a 4-wire configuration, and RJ25 uses all six wires. The RJ abbreviations, though, only pertain to the wiring of the jack (hence the name "registered jack"); it is commonplace but not strictly correct to refer to an unwired plug connector by any of these names. Typically you'll find the RJ-11 and RJ- 14 on your Plain Old Telephone Service (POTS)

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