CompTIA A+ Core 1 (220-1201)Mobile DevicesMedium
A user updates a contact's phone number on their Android tablet, and shortly afterward the same update appears automatically on their Android smartphone without any manual action. Which technology enables this behavior?
- ACloud account sync
- BNFC data transfer
- CWi-Fi Direct
- DBluetooth tethering
Show answer & explanationAnswer & explanation
Correct answer: A. Cloud account sync
Cloud account sync (such as a Google account) automatically propagates changes like contacts, calendar events, and settings across all devices signed into the same account, without requiring manual transfer.
Why the other options are wrong
- B. NFC transfer requires physically tapping devices together, not automatic background updates.
- C. Wi-Fi Direct creates a direct peer connection but doesn't automatically sync account data.
- D. Bluetooth tethering shares an internet connection, not contact data sync.
Cloud Account Sync
A service (e.g., Google, iCloud) that automatically keeps data like contacts, calendars, and settings consistent across all devices signed into the same account.
- Works over internet, not local connection
- Common for contacts, photos, calendar, app data
- Requires the same account signed in on all devices
Memory trick: Same account, same cloud — changes ripple to every device.