COMPTIA A+ Practice Exam 2026 - Free CompTIA A+ Practice Questions and Study Guide

RS232 is a standard serial port which is used to transmit data between a computer and a peripheral device. USB Type-C, Ethernet Cable, and HDMI are all different types of cables and ports, but they are not commonly referred to as RS232. While some older computers and devices may still use RS232, it is not as commonly used or recognized as USB, Ethernet, or HDMI. Therefore, B is the best answer as it is the only one that correctly identifies what RS232 is commonly referred to.