220-1002 Question #166: Real Exam Question with Answer & Explanation

The correct answer is A. Joe's data transmission is over the limit. This question tests understanding of mobile data throttling, where carriers reduce speeds after a subscriber exceeds their high-speed data allotment. Joe's usage pattern - GPS navigation, email hotspot, and streaming movies - is a classic recipe for burning through a data cap qui

Mobile devices

Question

Joe, a user who is travelling for business, reports that his mobile phone was getting approximately 35 Mbps for the first few days of his trip, but now it is only getting around 500 Kbps. Joe uses the device as a GPS to visit customers and as a hotspot to check work email and watch movies online. Which of the following is the MOST likely cause of Joe's slow data speeds?

Options

AJoe's data transmission is over the limit
BThe phone needs to be rebooted from overuse
CThe use of GPS interferes with data speeds
DThere is unintended Bluetooth pairing

Explanation

This question tests understanding of mobile data throttling, where carriers reduce speeds after a subscriber exceeds their high-speed data allotment. Joe's usage pattern - GPS navigation, email hotspot, and streaming movies - is a classic recipe for burning through a data cap quickly.

Approach. Option A is correct because Joe's dramatic drop from ~35 Mbps to ~500 Kbps is the textbook signature of carrier-imposed throttling after exhausting a plan's high-speed data bucket. His heavy usage - GPS, hotspot tethering, and video streaming - consumes large amounts of data rapidly. Most mobile carriers throttle speeds to 512 Kbps or lower once the cap is hit, which matches the 500 Kbps symptom exactly. The fact that it was fine for the 'first few days' and then degraded confirms a cumulative consumption event, not a device or network fault.

Common mistakes.

B. Rebooting resolves temporary software/memory issues, but a speed drop that persists across sessions and days is not a reboot-fixable problem - throttling is enforced server-side by the carrier, not by the device's state.
C. GPS is a receive-only radio technology that uses a completely separate radio chip and frequency band from cellular data. It does not interfere with LTE/5G data transmission.
D. Unintended Bluetooth pairing could theoretically create minor interference or battery drain, but Bluetooth operates on 2.4 GHz short-range signals and cannot reduce cellular data speeds from 35 Mbps down to 500 Kbps.

Concept tested. Mobile data throttling / data cap enforcement - understanding how carriers limit speeds after high-speed data allotments are exhausted, and recognizing the symptom pattern (high initial speeds followed by a sharp sustained drop to ~500 Kbps).

Reference. CompTIA A+ Core 1 (220-1101) - Domain 2: Networking, mobile device connectivity and data plan behavior

Topics

#data throttling#mobile hotspot#data cap#cellular data speed

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