Ham Radio General Class Practice Test 2026 – Complete Exam Prep

The DE-9 connector is widely recognized as a suitable choice for a serial data port, primarily due to its design and functionality for serial communication. This connector has nine pins, which allows it to support various signal configurations commonly used in serial communication protocols, such as RS-232.

The DE-9 connector is sufficient for connecting devices that communicate through serial data, which typically includes computers, modems, and interfaces for different peripherals. Its reliable connection and established use in serial applications contribute to its designation as a suitable option for this purpose.

In contrast, the other connectors listed, such as PL-259, Type N, and Type SMA, are primarily designed for RF (radio frequency) applications and not for serial data communication. Their fundamental purpose does not align with the requirements of serial communication, as they don't support the necessary pin arrangement or communication standards that a DE-9 does.