The correct answer is B. USB .
In the CompTIA A+ Core 1 (220-1201) objectives under mobile devices and connectivity methods , tethering refers to sharing a mobile device’s internet connection with another device such as a laptop. There are several tethering methods, including USB tethering, Bluetooth tethering, and Wi-Fi hotspot .
USB tethering is considered the most stable and reliable (tethered) connection because:
It uses a physical cable connection , eliminating wireless interference.
It provides consistent bandwidth and low latency .
It also charges the phone while connected , which is an added benefit.
It is less prone to disconnections compared to wireless methods.
Why the other options are incorrect:
A. Bluetooth
Bluetooth tethering is slower and less stable due to limited bandwidth and susceptibility to interference. It is not ideal for high-performance or stable connections.
C. Hotspot
A mobile hotspot uses Wi-Fi, which is wireless , not tethered. While convenient, it is less stable than a wired USB connection and can be affected by interference and signal range.
D. NFC
NFC (Near Field Communication) is used for very short-range communication like payments or quick pairing. It is not used for maintaining a continuous network connection.
Final Answer: B. USB
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