N10-005 Question #672: Real Exam Question with Answer & Explanation

The correct answer is C: RS-232. RS-232 (Recommended Standard 232) is the industry-standard interface specification for serial communication. It defines electrical characteristics and signaling for serial data transmission and uses connectors such as the DB-9 (9-pin) or DB-25 (25-pin). RS-232 serial ports were u

Question

Which of the following connector types is MOST commonly used for serial connections?

Options

AMTRJ
BRJ-11
CRS-232
DRJ-45

Explanation

RS-232 (Recommended Standard 232) is the industry-standard interface specification for serial communication. It defines electrical characteristics and signaling for serial data transmission and uses connectors such as the DB-9 (9-pin) or DB-25 (25-pin). RS-232 serial ports were ubiquitous on older computers and are still common on networking equipment like routers and switches for console/management access. MTRJ (A) is a fiber optic connector. RJ-11 (B) is the small 4/6-pin connector used for telephone handsets and DSL. RJ-45 (D) is the 8-pin connector used for Ethernet.

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