CompTIA Updated 220-1201 Exam Questions and Answers by ariel

NFC (Near-Field Communication) is a subset of RFID technology designed for very short-range wireless communication, typically within a few centimeters. It is primarily used for contactless transactions, like mobile payments, and can also support peer-to-peer data exchanges. NFC operates at 13.56 MHz and enables devices to communicate when placed near each other.

RG11 coaxial cable with quad shielding is designed to handle large volumes of internet traffic, providing excellent resistance to interference and high bandwidth capacity.

Why Not A (USB 3.1): USB 3.1 is used for connecting peripherals, not for high-volume internet traffic.

Why Not C (SATA3.0): SATA is used for internal data storage connections, not for network traffic.

Why Not D (Unshielded plenum RJ45): While RJ45 cables are commonly used, unshielded cables are prone to interference and are not ideal for high-volume traffic.

CompTIA A+ Exam Reference: Core 1 (220-1201), Section 3.1, cable types and their characteristics​.

CompTIA A+ explains that radio frequency (RF) connections use electromagnetic waves instead of copper or optical cabling. Satellite uses RF signals transmitted to and from orbiting satellites, while cellular networks (3G/4G/5G) use RF communications via cell towers.

Cable uses coaxial wired infrastructure, DSL uses telephone lines, Ethernet is twisted-pair copper, and fiber uses light instead of RF.

Satellite and cellular are the only technologies in the list that rely on wireless radio frequency transmission as their medium. The A+ networking domain emphasizes understanding the physical media of WAN technologies and distinguishing wired vs. wireless connectivity, making B and D the correct answers.

The 12VHPWR connector can supply up to 600 watts of power, designed for high-end graphics cards.

Why Not A (400W): This is less than the connector’s maximum capability.

Why Not B (MOW): This is an invalid option.

Why Not D (700W): The maximum supported power is 600W.

CompTIA A+ Exam Reference: Core 1 (220-1201), Section 3.4, power supply and connectors​.