220-1101 Question 28
Single answer1.3 Given a scenario, configure basic mobile device network connectivity and provide application support.A sales manager's company-issued smartphone can browse websites and receive email when connected to the office Wi-Fi, but maps and cloud-based CRM data stop working as soon as the user leaves the building. The user says the phone shows cellular signal bars, and voice calls work normally. A technician checks the device and finds that cellular data is turned off in the mobile network settings. Which action should the technician take FIRST to restore the user's application connectivity when away from Wi-Fi?
- A
Enable cellular data in the phone's mobile network settings
- B
Reconfigure the phone to use a static IP address on the cellular interface
- C
Change the office Wi-Fi network from WPA2 to WPA3
- D
Enable airplane mode and leave it on to force the phone to use voice services only
Show answer and explanation
Correct answer: A
Explanation
This scenario tests the ability to configure basic mobile device network connectivity for application support. The key clues are: Wi-Fi connectivity works, voice calls over the cellular network work, and data-dependent applications fail only when the user is off Wi-Fi. That combination strongly indicates that the phone is attached to the cellular network for voice service but is not permitted to use mobile data. The correct first step is to enable cellular data in the device's mobile network settings. This aligns with standard mobile OS and carrier best practices: verify that Wi-Fi, cellular data, airplane mode, and related network settings are configured correctly before moving to more advanced troubleshooting. Carrier networks automatically provision IP connectivity for most smartphones, so manually assigning a static IP is not a normal fix. Likewise, changing office Wi-Fi security is unrelated to off-site cellular data access.
- A. Correct.
Correct. If websites, maps, and cloud applications work on Wi-Fi but fail off Wi-Fi while voice calling still works, the most direct cause is that mobile data is disabled. Enabling cellular data allows the phone to use the carrier's packet data service for internet access and app connectivity when Wi-Fi is unavailable.
- B. Incorrect.
Incorrect. Smartphones do not normally require or use a manually configured static IP address for carrier-provided cellular data access. Cellular networks typically assign addressing automatically through the carrier. Choosing this option reflects a misconception based on traditional wired network troubleshooting.
- C. Incorrect.
Incorrect. The problem occurs when the user leaves Wi-Fi coverage, so changing the office wireless security standard would not restore connectivity on the carrier network. This distractor may seem plausible to someone focusing on the fact that Wi-Fi works in the office, but it does not address the failure away from Wi-Fi.
- D. Incorrect.
Incorrect. Airplane mode disables the device's wireless radios, including cellular data, and would prevent rather than restore mobile application connectivity. While toggling airplane mode can sometimes be used as a brief troubleshooting step, leaving it enabled would not solve the issue.