Which of the following represents a category of signal and data transmission that uses physical media?

• A. Wireless
• B. Physical point-to-point connectivity wired or optical
• C. Satellite
• D. Bluetooth

Answer: (B)

The key idea is distinguishing how signals travel: through physical cables or through air/space. Using physical media means the signal runs over tangible cables—wired connections or optical fibers—between devices, often in a direct, point-to-point link. This category describes wired or optical links that physically connect endpoints, like copper Ethernet or fiber optic cables. The other options describe wireless methods, which transmit via air or space without a physical cable, so they don’t fit the requirement of using physical media. Therefore, the category that uses physical media is the wired or optical, point-to-point connectivity.