Which of the following is a characteristic of a serial I/O port?

The correct answer is C. DB-9 connector. Serial I/O ports (COM ports) on PCs use a DB-9 (9-pin D-subminiature) connector, also called a DE-9. These ports transmit data one bit at a time sequentially. The DB-15 (B) is associated with VGA video ports and game/MIDI ports. RJ-11 (A) is a telephone jack, and RJ-45 (D) is…

Hardware

Question

Options

ARJ-11 connector
BDB-15 connector
CDB-9 connector
DRJ-45 connector

How the community answered

(63 responses)

A
3% (2)
B
5% (3)
C
90% (57)
D
2% (1)

Explanation

Serial I/O ports (COM ports) on PCs use a DB-9 (9-pin D-subminiature) connector, also called a DE-9. These ports transmit data one bit at a time sequentially. The DB-15 (B) is associated with VGA video ports and game/MIDI ports. RJ-11 (A) is a telephone jack, and RJ-45 (D) is an Ethernet network connector - neither of these is a serial I/O port. Recognizing DB-9 as the serial port connector is a fundamental A+ hardware identification skill.

Topics

#serial port#DB-9 connector#I/O ports#COM port

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